Although Amethyst, the purple variety of Quartz, and Citrine, the yellow/orange variety of Quartz belong to the same scientific mineral classification, they have always been distinguished as …

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Canadian Amethyst - The Mineral and Gemstone KingdomAmethyst with an internal coating of red Hematite under the crystal surface, found near Thunder Bay, Ontario, Canada.

It has been ages since I was on here and I don't quite know how to pick up where I left off. But I still have Thunder Bay amethyst and can send a flat rate USPS mailer, medium, for $40.

Siberian Amethyst - The Mineral and Gemstone KingdomTerm originally used to describe very deeply colored Amethyst from Siberia in Russia. May also be incorrectly used in the gem trade …

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Half of a hollow geode lined on the inner surfaces with Amethyst crystals. All of the amethyst crystals are clean and lustrous with medium purple color and are internally transparent.

For example, pure Quartz (SiO 2), is colorless, whereas Amethyst, a purple variety of quartz, has its purple color caused by traces of the element iron. The amount of iron present determines …

Vitreous Luster glossary term at minerals.net educational reference guide