Onyx is a calcareous material with a very fine grain and many veins running concentrically to one another. Onyx is an extremely variable stone with heavy veining. No two pieces of onyx are ever exactly alike, and one slab might contain dozens of colours. Onyx has strikingly dramatic colours and patterns making it perfect for vanity tops, walls or floor features, island front panel, bar tops and splashbacks. Onyx is a translucent stone that can be backlit to showcase its beauty.