Clear Quartz -Pure silicon dioxide, is also called Rock Crystal or Ice Crystal, from the Greek word "krystallos", meaning "ice", because crystal was believed to be water frozen so hard it could never thaw. The prismatic hexagonal crystals have relatively smooth sides and naturally faceted terminations at one or both ends, and may be transparent as glass, milky or striated, often found in clusters and ranging in all sizes.
White topaz - November Birthstone Topaz gemstone occurs as a coloured gemstone. However, impurities impart a white colour. Topaz is usually faceted into a pyramid shape with a flat base.