Onyx Countertops: 17 Frequently Asked Questions Answered

Onyx Countertops Frequently Asked Questions

Onyx countertops have recently been making a name for themselves in the world of home design, capturing the attention of homeowners and interior designers alike.

They are lauded for their stunning beauty, radiating an allure that is difficult to rival. Each slab of onyx is unique, boasting its own intricate patterns and vibrant colors, just like a piece of abstract art.

This distinctiveness makes onyx countertops a powerful statement piece in any home, elevating the space’s aesthetic appeal. But as with any material, it’s essential to understand what you’re getting into.

That’s why we’ve compiled a comprehensive list of the 17 most frequently asked questions about onyx countertops to help you make an informed decision.

FAQ 1: What is Onyx?

Onyx is a fascinating natural stone with a history as vibrant as its appearance. Unlike other stones commonly used for countertops, like granite or marble, onyx is a form of quartz.

It’s formed in caves as stalactites and stalagmites drip to create this precious stone. Remember those school trips to cavernous wonders where you’d gaze in awe at the stalactites and stalagmites? Who knew that they were secretly nurturing such a beautiful material!

One of the key characteristics that sets onyx apart from other natural stones is its translucence. Hold a slab of onyx up to the light and you’ll see it glow with a mesmerizing luster.

This property makes it a phenomenal choice for backlighting, setting your countertops alight with a warm, inviting glow.

Trust me, there’s nothing quite like walking into a kitchen that’s illuminated by a backlit onyx countertop. It’s like stepping into a different world.

In addition to its translucence, onyx is known for its incredible veining patterns. When I first laid eyes on an onyx slab, I was completely taken aback by the intricate labyrinth of lines that weaved their way through the stone.

It was like looking at a piece of abstract art. Each vein told its own unique story, contributing to the overall narrative of the stone.

Unlike many other natural stones, no two onyx slabs are the same – each one boasts a unique pattern, making your countertop a one-of-a-kind masterpiece.

FAQ 2: What Are the Pros and Cons of Onyx Countertops?


1. Aesthetic Appeal

Believe me when I say that onyx is flat out gorgeous. I once visited a friend who had an onyx countertop and was just taken aback by how stunning it was.

The patterns, the colors, the way it glowed under the right lighting – it was a sight to behold. If you aim to create a visually arresting space that exudes luxury, onyx countertops are the way to go.

2. Uniqueness and Individuality

Remember when I said that no two onyx slabs are the same? That’s a significant part of its allure. With an onyx countertop, you’re not just installing a functional surface to prepare your meals; you’re adding a unique work of art to your home. It’s one of the aspects that I love most about onyx.

3. High Market Value

While it’s true that onyx is more expensive than other countertop materials, it’s worth noting that it adds considerable value to your home.

If you ever decide to sell, prospective buyers will certainly appreciate the opulence and elegance that onyx brings.


1. Susceptibility to Scratching and Staining

As stunning as onyx is, it does come with its drawbacks. The stone is comparatively soft and can be prone to scratches and stains.

I remember when I set a hot pan down on my friend’s onyx countertop, leaving behind a faint but noticeable mark that was a pain to remove.

2. Need for Proper Care and Maintenance

Finally, onyx countertops demand a good deal of care and maintenance. They need to be sealed regularly to prevent staining and damage.

From my experience, I recommend using a protective mat or trivet when placing hot items on the countertop to avoid damage.

Trust me, taking extra caution will make your onyx countertop last longer and continue to dazzle everyone who steps into your kitchen.

FAQ 3: How Durable Are Onyx Countertops?

1. Durability Compared to Other Stone Countertops

One question I often get asked is how onyx stacks up against other stone countertops in terms of durability.

Let’s be clear: onyx is not as hard as granite or quartz. But this doesn’t mean it’s not a viable option.

Think of it this way: a diamond is much more complex than a pearl, but that doesn’t make the pearl any less beautiful or valuable, does it? The same applies to Onyx.

Yes, it may require a little more care, but the payoff is truly worth it.

2. Effective Use in Different Areas

Another aspect to consider is where to use Onyx in your home. Due to its slightly softer nature, I wouldn’t recommend it for high-traffic areas like the kitchen.

However, it works wonders in areas where it won’t be subjected to heavy wear and tear. For instance, I’ve seen onyx used effectively in bathrooms and for bar tops.

Its translucency can create a stunning effect when backlit. I remember walking into a friend’s house and being mesmerized by their backlit onyx bathroom countertop. It felt like a private luxury spa.

Remember, the key to making the most of your onyx countertops is understanding and respecting the stone’s unique properties.

By doing so, you can enjoy the opulence of onyx without worrying unduly about its durability.

FAQ 4: How Do Onyx Countertops Compare to Marble and Granite?

When comparing onyx with more commonly used countertop materials such as marble and granite, it’s like comparing apples to oranges. They have unique charm and advantages, but let’s dive deeper into some key factors.

1. Appearance – A Feast for the Eyes

Onyx has a certain mystique that neither marble nor granite can compete with. Picture this: I was at a client’s house the other day, and I couldn’t help but marvel at their onyx countertop’s unique pattern and depth.

It seems to have a life of its own with its gorgeous, swirling patterns. On the other hand, marble and granite, while elegant, tend to have more understated and consistent patterns.

2. Maintenance – A Labor of Love

Onyx does require a bit more maintenance than marble and granite. My neighbor, an onyx enthusiast, has a ritual of resealing his countertop every six months to maintain its luster.

Marble and granite, on the other hand, require less frequent sealing, making them a bit easier to care for.

3. Cost – An Investment Worth Making

In terms of cost, onyx is generally more expensive than marble and granite due to its rarity and unique aesthetics.

I recall a time when I was browsing through a stone yard, completely blown away by a piece of onyx, only to realize it was nearly twice the price of the marble slabs next to it!

However, onyx’s breathtaking beauty and exclusive feel might make the investment worth it for many homeowners.

Remember, each of these stones has its charm and advantages. Your choice depends on your style, budget, and how much effort you’re willing to put into maintaining your countertops.

FAQ 5: Using Onyx in Kitchens – A Delicate Balance

The answer to whether onyx countertops can be used in kitchens isn’t simply a yes or no. It’s more of a delicate balance between aesthetics and practicality.

A friend installed an onyx countertop in her kitchen a couple of years ago. Visually, it was magnificent, adding an exquisite touch of luxury to her space.

However, she soon realized that Onyx’s beauty comes with a certain level of responsibility.

Onyx, a softer and more porous stone than granite or marble, is prone to scratches and stains.

My friend learned this the hard way when she accidentally dropped a pot on her countertop, leaving a noticeable scratch.

It was a heartbreaking moment, I can tell you that. That’s why it’s essential to be extra cautious when using heavy kitchen utensils on an onyx countertop.

Onyx countertops also require regular sealing to prevent damage from acidic substances like citrus juice or vinegar, commonly used in kitchens.

My friend now has a routine where she seals her onyx countertop every three to four months, mainly because it’s in the kitchen where spills are just a part of daily life.

This might seem like a lot of work, but believe me, the captivating beauty of Onyx makes it worth the extra effort.

So, if you’re considering onyx for your kitchen countertops, remember they can be a breathtaking addition but require more care and maintenance than other stone options.

Consider your lifestyle and how much time you will dedicate to upkeep. If that balance works for you, then Onyx might be the perfect choice.

FAQ 6: Are Onyx Countertops Suitable for Bathrooms?

Like in the kitchen, onyx countertops can create a dramatic and luxurious look in a bathroom. But as always, there are a few key things to remember.

1. Aesthetic Appeal

Let me start by saying that Onyx, with its unique and striking patterns, can bring unparalleled elegance to any bathroom.

A cousin of mine once installed an onyx countertop in her master bath, and I must say, it looked like something straight out of a high-end spa!

2. Reflects Light

Another advantage of using onyx in a bathroom is its semi-translucent properties. When backlit, onyx can create a soft, warm glow that can transform a regular bathroom into a soothing and serene space.

My cousin took full advantage of this by installing under-counter lighting; the effect was breathtaking!

3. Requires Regular Sealing and Maintenance

However, just like in the kitchen, an onyx countertop in a bathroom also requires regular sealing and careful handling.

In a bathroom scenario, it’s essential to prevent water and other substances from seeping into the stone and causing damage. Regular sealing (about every four months) is critical here.

When I was visiting my cousin, I noticed a small water stain on her pristine onyx countertop. A soap dispenser had been leaking, and the contained soap had seeped into the unsealed part of the stone.

Consequently, she had to bring a professional to restore the countertop’s original beauty. This incident was a stark reminder that although onyx is undeniably beautiful, it comes with a specific maintenance responsibility.

So, if you’re considering onyx for your bathroom countertops, remember that they can contribute to a stunning aesthetic but come with a need for consistent care and attention.

If you’re okay with that balance, an onyx bathroom countertop can certainly be a superb choice.

FAQ 7: What Colors and Veining Patterns Are Available for Onyx Countertops?

Onyx is a chameleon in natural stone because of its wide array of colors and unique veining patterns.

It’s a beauty that captures the eye and transports you to a world of elegance and luxury. Allow me to share some popular onyx varieties based on my personal experiences and observations.

1. White Onyx

White Onyx, with its pure ivory hue punctuated with subtle bands of color, is a favorite choice among many of my friends.

My neighbor Julia has a white onyx countertop in her powder room, which is stunning. The soft white stone paired with warm lighting creates a serene atmosphere you can’t help but admire.

2. Green Onyx

Green Onyx is another impressive variety. It has a rich, verdant hue that breathes life into any room. My friend Mark used green onyx for his bathroom vanity, which was ingenious.

The countertop’s vibrant emerald streaks add an organic, earthy vibe that complements the natural light coming through the skylight.

3. Honey Onyx

A delightful surprise in the onyx family is Honey Onyx. Its warm, golden tone embodies the elegance of a bygone era.

My aunt decided to install a honey onyx countertop in her kitchen, and it gives the whole room an inviting, sun-kissed glow that is absolutely mesmerizing.

4. Red Onyx

Finally, there’s Red Onyx, a bold and vibrant stone with a rich color palette ranging from deep burgundy to bright crimson.

My colleague installed a red onyx countertop in his home bar area, and it’s a real conversation starter, adding a dash of drama and intensity to the space.

Each onyx color and pattern tells a unique story and adds a personal touch to your space. Remember, the colors and patterns can vary widely, just like nature.

You can’t go wrong with any choice as long as it reflects your unique style and meets your aesthetic needs.

FAQ 8: How to Choose the Right Onyx Countertop for Your Home?

1. Consider the Color:

The first factor to consider when choosing an onyx countertop is color. As I’ve mentioned, onyx is available in various shades, from serene white and vibrant green to warm honey and bold red.

My cousin once selected a honey onyx countertop for her Mediterranean-style kitchen, and it was incredible how the warm, golden hue added a touch of elegance and sophistication to the space.

2. Look at the Veining:

Onyx’s beautiful veining is its signature. Each slab is unique, with its pattern and banding.

My friend Peter has a white onyx countertop in his home with delicate grey veining that seamlessly blends with his modern kitchen decor.

So, when you’re at the store, examine each slab closely to find one that resonates with your style.

3. Consider Your Lighting:

Onyx is a translucent stone and can be backlit for a stunning visual effect. My neighbor Julia has backlit her white onyx bathroom countertop, and it’s breathtaking how the light illuminates the stone, highlighting its detailed patterns and creating a soothing ambiance.

So, consider where the countertop will be installed and how the lighting conditions will interact with the stone.

4. Think About Maintenance:

Onyx requires a bit more care than other stones. My aunt, who installed honey onyx in her kitchen, always immediately wipes up spills to prevent staining. You may also need to reseal the surface periodically to keep it looking its best.

5. Work with a Trusted Supplier:

Lastly, working with a reputable supplier who can provide high-quality slabs and offer guidance on the selection process is crucial.

My colleague who installed red onyx in his home bar area stresses the importance of this point. His supplier helped him choose a stunning slab and provided tips on maintaining it.

Ultimately, the right onyx countertop reflects your personality, matches your aesthetic preferences, and fits well within your space.

FAQ 9: Understanding the Price Range for Onyx Countertops:

You’re probably wondering about the price range for onyx countertops. I’ve found the price to vary quite a bit, depending on a number of factors.

My cousin, who has a stunning green onyx countertop in her bathroom, mentioned that the rarity of the stone played a role in determining its cost. More common variants of onyx tend to be less expensive than the rarer types.

The source of the onyx also impacts the price. For instance, my friend George imported a unique slab of Italian onyx for his office desk.

Given the international shipping and customs fees, the cost was significantly higher than if he had chosen a domestically sourced stone.

In my experience, the price of onyx countertops can range from moderate to high-end, but remember that these luxurious surfaces are a long-term investment.

Consider the cost in terms of the beauty, elegance, and unique character that onyx will add to your space.

Always work with a trusted supplier (as I mentioned earlier) who can provide a fair price and guide you in finding the perfect slab.

FAQ 10: Are Onyx Countertops High Maintenance?

Yes, onyx countertops require careful maintenance to retain their lustrous beauty. However, these countertops can stay stunning long with the proper care and a little love. Here are some tips I’ve picked up along the way:

1. Regular Cleaning

Just like my sister-in-law, who insists on cleaning her white onyx kitchen island daily, regular cleaning is a must.

Use a soft cloth or sponge with mild soap and warm water to clean the surface gently. Never use harsh or abrasive cleaners as they can damage the stone’s surface.

2. Spill Management

My neighbor, a proud owner of a black onyx coffee table, always emphasizes the importance of immediate spill clean-up.

Since onyx is a porous stone, it can stain if spills aren’t promptly addressed. So, the moment you spill, clean it up to avoid seepage and staining.

3. Sealing

I remember when my best friend got a honey onyx backsplash installed in her kitchen. She had it sealed immediately after installation and does so annually.

Sealing onyx countertops helps protect them from stains and damage, an essential step in the maintenance process.

4. Use of Trivets and Cutting Boards

My cousin, who has an onyx countertop in his barbecue area, always uses trivets under hot pans and cutting boards while chopping.

Onyx can be sensitive to heat and scratches, so protecting it from direct contact with hot pans, sharp objects, and rough utensils is essential.

5. Professional Polishing

I hire a professional to polish my onyx bathroom vanity every two years. This keeps its shine intact and makes it look as good as new.

The professionals have the right equipment and know-how to do the job without damaging the stone.

In conclusion, while onyx countertops require some attention and care, their mesmerizing beauty and elegance make it all worth it.

And remember, with the proper care, your onyx countertop can be a timeless centerpiece in your home.

FAQ 11: Can Onyx Countertops Be Repaired if Damaged?

When my daughter accidentally dropped a heavy pot on our onyx countertop, I had a firsthand experience of how a beautiful piece of stone can be damaged instantly. Thankfully, I learned that onyx countertops can undoubtedly be repaired if damaged.

Understanding the Damage

The first step in the repair process is to understand the extent of the damage. Chips, cracks, and scratches are common types of damage seen in onyx countertops. In my case, the impact of the pot caused a noticeable chip in our countertop.

Seeking Professional Help

I realized from my incident that onyx is a delicate stone and requires professional expertise for restoration.

The restoration process can be intricate and demands specific tools and knowledge that most homeowners, including me, don’t possess. So, calling in the professionals is often the best course of action.

The Repair Process

The repair begins with cleaning the damaged area and then filling it with a color-matching resin or epoxy.

In our case, the restorers did a fantastic job – they filled the chipped area so seamlessly that it was almost impossible to tell where the damage had been.

Polishing and Sealing

Once the repair was done, the restorers polished the countertop to restore its original shine. They also resealed it to offer protection from future damage.

This experience taught me the importance of regular sealing in preserving the beauty and longevity of onyx countertops.

In conclusion, can onyx countertops be repaired if damaged? Absolutely! But remember, professional intervention is often necessary.

With the proper care and timely restoration, your onyx countertops can continue to be the star element of your home decor.

FAQ 12: How to Clean Onyx Countertops Safely?

Cleaning onyx countertops can be a delicate task – a lesson I learned after calling professionals to fix a chip caused by an ill-placed pot. Here’s my step-by-step guide to ensure my countertop stays clean and chip-free.

1. Gather Your Cleaning Supplies

First, using the right tools and products is essential when cleaning your onyx countertops. I always use a soft, non-abrasive cloth and a mild, pH-balanced cleaner. Remember, harsh cleaning agents can etch the surface of the onyx and cause damage.

2. Wipe Down the Countertop

Once you have your supplies, begin by wiping down the entire surface of the countertop to remove any loose dirt and debris. I usually do this with a damp cloth, moving gently, circularly.

3. Apply the Cleaner

Next, apply the pH-balanced cleaner across the surface. I spray it evenly across the countertop, ensuring not to over-saturate it.

4. Wipe the Countertop Clean

Once the cleaner has been applied, I gently wipe down the countertop using the soft cloth in circular motions. Rinse the cloth frequently to avoid re-depositing dirt onto the surface.

5. Dry the Countertop

Finally, it’s essential to dry the countertop thoroughly. I use a soft, dry towel for this. Leaving any moisture behind can lead to water spots, which can be tough to remove later.

Following these steps has helped me maintain the stunning appearance of my onyx countertops. And remember, occasional professional cleaning and sealing can keep your countertops in peak condition for years to come.

FAQ 13: Can Onyx Countertops Be Installed DIY?

The Complexities of Installing Onyx Countertops

In my personal experience, I’ve found that installing onyx countertops isn’t a task to be taken lightly.

Onyx is a delicate and brittle stone that requires careful handling. One wrong move and you could end up fracturing the slab, leading to costly replacements or repairs.

I once decided to DIY install a small onyx countertop in my guest bathroom – let’s say the project quickly turned messy. I underestimated the slab’s weight and had difficulty aligning it correctly.

The Skills Required for Installation

Secondly, installing an onyx countertop involves specific skills and tools. You need to know how to precisely measure and cut the slab to fit your countertop area, not forgetting the cut-outs needed for the sink and faucets.

I attempted to cut out the sink area and ended up with a misshaped hole that was more oval than round. It took an embarrassing call to the professionals to fix my mistake.

The Benefits of Professional Installation

After my multiple DIY setbacks, I believe professional installation is the way forward. I had a team of professionals install my kitchen’s onyx countertop, and the experience was entirely different.

They flawlessly managed every aspect, from the precise measurement to the careful installation. The result was a perfectly installed onyx countertop that immediately became the centerpiece of my kitchen.

So, while installing an onyx countertop by yourself might seem tempting, I’d recommend relying on professionals.

They have the experience, tools, and expertise to ensure a perfect fit. The sight of my stunning, professionally installed onyx countertop reminds me that it was money well spent, and I haven’t looked back since.

FAQ 14: What Are Some Creative Uses for Onyx in Home Design?

Onyx is not just for countertops – its natural beauty and unique patterns make it a versatile material for home design. Let me share some of the creative ways I’ve utilized onyx to transform my home.

1. Onyx Wall Panels

One of my favorite uses of onyx in my home is as a wall panel. I installed a large onyx slab in my living room, which serves as an exquisite backdrop for my art collection and a conversation starter for my guests.

The panel’s unique patterns and natural hues add a touch of elegance to the room, creating a stunning focal point.

2. Onyx Table Tops

Onyx tabletops are a brilliant way to bring a slice of nature into your home. My home office has a small coffee table with an onyx top.

Its calming colors and intricate patterns inspire me during my workday, reminding me of the beauty of the natural world.

3. Backlit Onyx Installations

Backlit onyx installations are nothing short of magical. I have a backlit onyx wall in my dining room, and it’s a sight to behold.

The soft, diffused light filtering through the onyx slab highlights its patterns and veining, creating a warm and inviting atmosphere. It’s like having a dynamic, ever-changing art in my dining room.

4. Onyx Bathroom Fixtures

Finally, I’d be remiss not to mention my onyx sink. It’s a striking feature in my guest bathroom, complementing the onyx countertop beautifully. The sink’s unique shape and the onyx’s natural variation make it unique.

So, there you have it! These are just a few ways onyx can serve as a centerpiece in your home design, bringing natural elegance to your space.

Whether you choose a backlit wall installation or a simple onyx sink, this versatile material will not disappoint.

FAQ 15: Where Can You Buy Onyx Countertops?

Purchasing onyx countertops is an important decision; choosing the right supplier can make all the difference.

I remember when I decided to install my onyx sink, it took me a while to find a supplier who could provide the quality and design I was looking for.

1. Local Stone Suppliers:

Your local stone supplier might be the first place to consider. They usually have various stone options, including, of course, onyx.

I found my supplier by chance while passing through my local market. The onyx sink in their display caught my eye; the rest is history!

2. Online Marketplaces:

Online marketplaces such as Alibaba or eBay might offer a broader range of options. They provide the advantage of connecting you with suppliers from all over the world.

However, I must stress the importance of doing your due diligence to ensure you deal with a reputable seller.

3. Specialized Online Retailers:

Specialized online retailers such as BuildDirect and StoneContact cater to home improvement and construction industries. They often have various onyx countertops in various colors and patterns.

4. Directly from Quarries:

If you’re considering a significant renovation or have a large project, it might be worth buying directly from a quarry.

This could save you some money, but remember that you’ll need to arrange to cut and polish the stone yourself.

Working with experienced suppliers is crucial when it comes to Onyx. This material is considerably more fragile than other stones, and inexperienced handling can lead to damage.

So whether you opt for a local supplier, an online marketplace, or a quarry, ensure they have a solid track record when dealing with Onyx.

Take my word for it; this extra precaution will save you a lot of potential headaches down the line.

FAQ 16: How Do Onyx Countertops Affect Home Resale Value?

Onyx countertops can significantly contribute to your home’s resale value, and here’s why:

1. Uniqueness and Exclusivity:

When I installed my first Onyx countertop, I was fascinated by its unique patterns and exquisite colors. It gives a distinct edge to the interior of your home.

As it’s not a standard choice for countertops, it sets your home apart, appealing to potential buyers looking for something out-of-the-ordinary. I’ve had folks walk into my kitchen and immediately comment on the stunning countertop!

2. Aesthetic Appeal:

Let’s not forget the sheer beauty of Onyx. The way the stone catches light is simply breathtaking. Its translucent property allows backlighting, creating an ethereal glow that can turn any ordinary kitchen into a luxury space.

When I flipped the switch on my backlit Onyx countertop, I knew I had made a fantastic investment. It turned my humble kitchen into a gourmet chef’s paradise.

3. Value-Addition:

Onyx is undoubtedly perceived as a luxury material and for a good reason. Like a designer handbag commands a higher price, homes with Onyx countertops also attract a premium.

When I put my previous home on the market, the realtor suggested I highlight the Onyx countertops in the listing. The house sold quickly and at a rate much higher than similar homes in the neighborhood.

In conclusion, Onyx countertops can significantly enhance your home’s resale value due to their unique qualities and luxurious appeal.

However, they do require careful maintenance to keep them in top shape. So if you are considering an upgrade that will add value to your home, Onyx countertops are worth considering!

FAQ 17: Are There Sustainable Options for Onyx Countertops?

Yes, indeed, sustainable options for Onyx countertops are available. In my quest for sustainable home improvement, I came across manufacturers committed to ethical sourcing and sustainable production of Onyx.

These manufacturers prioritize sourcing Onyx from mines that adhere to responsible mining practices, safeguarding the local ecology and ensuring the welfare of the mining communities.

Moreover, during production, they minimize waste and conserve resources by recycling and reusing wherever possible.

But what does this mean for you as a homeowner? Choosing sustainably sourced and manufactured Onyx means you’re contributing to a greener planet.

You might not see the direct impact, but rest assured, it’s a significant step toward promoting ethical practices in the industry.

Whenever I run my hands over my own sustainably sourced Onyx countertop, I feel fulfilled knowing that my choice has made a positive difference.


We have discussed numerous aspects of Onyx countertops in this FAQ. From their unique aesthetic appeal to their potential to increase the value of your home and even to the sustainable options available, it’s clear that these countertops offer a plethora of benefits.

The breathtaking beauty, the distinctive edge, and the ethical choice they represent are just some extraordinary features that make Onyx countertops stand out.

In my experience, the investment in Onyx has been well worth it, not just for its visual appeal but for the value it adds to my home and its statement about my commitment to sustainability.

So, if you’re considering a home improvement project, I would encourage you to ponder Onyx countertops. They are not just a home upgrade; they’re a lifestyle choice!


Hi! I’m Kobby, one of the co-owners of favoredstoneguides.com and the newest house owner in town. I’m a huge fan of most things natural. Over here on this site, I'm happy to share all the exciting hacks, tricks, and tips I have learned and continue to learn each day about taking care of natural stones.

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