The Beauty of Onyx

I’ll be honest, when I first thought of onyx I pictured a black material. However I was surprised to find out that this material is actually mainly light in color and is translucent. That means you can have a light source behind or under it and it will glow!

So what is onyx exactly? Onyx countertops are quite rare. Onyx is made of a calcareous stone (meaning mostly or partly composed of calcium carbonate, in other words, containing lime or being chalky). In caves, drip water forms onyx as stalactites and stalagmites. It is a soft, brittle stone and should be carefully evaluated for its intended use. It’s slabs are formed by dissolving limestone and redeposited as a new kind of stone. Onyx slabs almost always have a fiberglass mesh material on the back to hold the stone together. This is an indicator of just how fragile the stone is and how valuable it is to find pieces that will work together for larger installation pieces.

Sinks and backsplashes made with onyx have a unique and look awesome.

It also makes a stunning wall display that can be backlit.

As a countertop, onyx is visually appealing but has some drawbacks.. Wine, fruit juice, lemons, and vinegar will all react with onyx and can etch the surface, so make sure to wipe up spills right away. It will scratch easily and quickly looks old and well worn so care must be taken with where you use it and how you treat it. It is not like granite that can take a beating, so make sure to NOT use it as a cutting surface.

If you choose to use onyx, Real Stone and Granite located on the Treasure Coast is your go to source if your in South East Florida. When I was at their facility I got to see some onyx slabs for an upcoming job they had for a bar. It was phenomenal! They will work hard to make sure you are able to get what you need for whatever project you are doing.

Post written by Jennifer Harris of


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