Onyx is a natural stone found in caves and is made up of small crystals called cryptocrystallines that drip from stalactites. This dripping process gives the stone its unique swirled pattern. Onyx comes in a variety of colors, ranging from white to pink to honey.
The appeal of limestone is that it offers a variety of colors and finishes. Limestone lends itself well to molding and sculpting and is an excellent natural stone option for design elements like walls and fireplaces.