These Brown Onyx from West Java have some wonderful bands of light red, brownish yellow and beige translucent. It is formed with bands of microscopic quartz crystals, though the color of onyx varies depending on the type, this popular stone long remarked for its beauty can be identified by its signature bands and translucent luster. Onyx forms as a result of igneous rock marrying with the silica deposits in groundwater. The colorful bands that give the semi-precious stone its trademark bands are layers of deposits that develop on top of each other. Brown Onyx is one of the most highly praised banded stone in the world. It is known for its extremely tight banding and vibrant shades of colors.