This "Beautiful Cluster of Amethyst" is a Royal Statement Necklace. Amethyst is a crystalline quartz in shades of purple, lilac or mauve. Amethyst is the birthstone of the month of February. It's very popular and although it is the rarest form of quartz, it's fairly common in the world. Amethyst is a fairly hard gem, as is quartz. It is usually a six-sided quartz and can be found within geodes across the globe. Completed with a Toggle Closure and Coordinating Earrings ($10) .