Green Amethyst is somewhat unusual, better-known amongst collectors, and very limited in its fine qualities (i.e. Tourmaline is the only other gemstone that possesses this property. All forms of Quartz are piezoelectric when heated or rubbed they create an electrical charge becoming a magnet that attracts lightweight objects. Cryptocrystalline (small crystal) Quartz gemstones include Agate, Chalcedony, Jasper, and Onyx. Rio Grande Green Amethyst is a variety of macrocrystalline (large crystal) Quartz, a group which also includes Amethyst, Citrine, Lavender Quartz, Madagascan Rose Quartz, Tibetan Quartz, and Tiger’s Eye. The modern name Quartz is derived from the Saxon word ‘querklufterz’, meaning cross-vein-ore. Although Quartz of sufficient beauty to be set into jewelry is not available in great abundance, it is found in many geological environments, is a component of almost every rock type, and is also the most varied mineral in terms of varieties, colors and forms. It is also known as Vermarine, Green Quartz, Lime Citrine or by its gemological name, Prasiolite (from the Greek words ‘prason’, meaning leek and ‘lithos’, meaning stone). Ranging in shades of green from pastel to deep forest greens (sometimes with secondary yellow and grey tints), Green Amethyst is the green variety of Quartz. Mostly mined in Brazil, Green Amethyst can be a confusing gem as it is traded under a variety of names.
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