The Gem Expo a great place to stock up on mineral specimens from around the world at affordable prices. Amethyst, Rose Quartz, Clear Quartz all belong to the family of Quartz. Quartz is naturally clear, any chemical impurities will allow the colour to “shine” through. Amethyst, tiger eye, adventurine, and agates are all varieties of quartz with impurities in them to cause their distinctive colour. Growing shape is also influenced by the impurities and growing environment.
