A variety of volcanic rock related to obsidian, rhyolite is composed of a mixture of quartz, silica and feldspar. It occurs in various shades of green, white, and brown. The geological formations known as “lava domes” are formed from a type of rhyolite. These irregularly shaped stone chips are smoothed and vary slightly in size and shape. They are marbled with shades of green, white and brown.
Semi-precious stone beads are mined all over the world and then are usually cut in China. They will often be dyed or color-treated to enhance their appearance. We select the best quality semi-precious that is available, and try to avoid finishes that are not durable. It is best to assume that some semi-precious beads will fade over time.