Onyx stone, often being called "onyx marble",  is a cryptocrystalline form of quartz. The colors of its vein-like bands range from white to almost every other colors other than such shades as purple, blue, or black. Name "Onyx" has sometimes been misused to label other banded lapidary materials, such as banded calcite found in Mexico and Pakistan. This material is much softer than true Onyx stone, and much easier to find. Some products carved or fabricated in such "Onyx" are seen in the market. So, you need to be careful when considering the onyx stone as decoration material and make sure you are getting the true onyx stone in the geological sense. The onyx stone tile has beautiful colors. Green onyx, blue onyx, white onyx and red onyx are commonly seen onyx colors. In particular, a piece of thin white onyx or light color onyx slab  will have the  translucent feature, making them ideal material for lighted stone decorations.