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- Amethyst Gemstone | Amethyst Stone - GIA
Amethyst Gemstone is the purple variety of the Quartz mineral Amethyst’s purple color can range from a light lilac to a deep, intense royal purple, and from brownish to vivid
- Amethyst History and Lore - GIA
Fine amethysts have been set in religious jewelry and royal crown jewels for ages It was once considered equal in value to ruby, emerald, and sapphire
- Amethyst - Gemological Institute of America
Amethyst is a gem with purple coloring that many people find very beautiful It is the purple variety of the mineral quartz It was as valuable as ruby and emerald until the 1800s when more amethyst was found in the country of Brazil It is the most valuable quartz gem Today, many kinds of jewelry are made from amethyst
- Amethyst Description - GIA
Amethyst Description This amethyst crystal is from Namibia It shows classic quartz crystal shape: a six-sided columnar crystal with a pyramid-shaped termination at the top Courtesy Daniel Trinchillo, Fine Minerals International Amethyst is the purple variety of the quartz mineral species
- Amethyst Quality Factors - GIA
Amethyst’s color quality ranges from extremely pale to intense or very dark - ©GIA and Tino Hammid Any brownish or bronze-colored tints in an amethyst’s purple color, or any noticeable color zoning, lower its value dramatically Buyers of loose amethysts view color zoning by placing the gems table-down against a white background
- Amethyst Care and Cleaning Guide - GIA
Amethyst Care and Cleaning Guide With proper care, amethyst is a beautiful and versatile gemstone for jewelry use - Courtesy Epstein Hardness and toughness Gem and mineral hardness is measured on the Mohs scale The numbers are based on the relative ease or difficulty with which one mineral can be scratched by another But the Mohs scale is
- February Birthstone | Amethyst Birthstone Source Meaning | GIA
Amethyst, the February birthstone, is the purple variety of quartz It is said to prevent drunkenness and make you quick witted in business You once had to be rich to own this birthstone for February, but new finds have made it more affordable Learn more about this stunning birthstone and where it can be found
- Amethyst from Four Peaks, Arizona - GIA
The most important commercial source of gem-quality amethyst in the United States is the Four Peaks mine in Maricopa County, Arizona (figure 1) Discovered by accident in the early 1900s by a gold prospector, this deposit has been worked intermittently on a small scale ever since Good-quality amethyst from a U S occur-rence has special value in the marketplace, but the challenge at this
- 紫水晶 | 紫水晶 - GIA
Amethyst from Boudi, Morocco Fabrizio Troilo, Abdelghani El Harfi, Salahaddine Mouaddib, Erica Bittarello, and Emanuele Costa , 四月 30, 2015 阅读详细内容（英语） 摩洛哥紫水晶：采矿和营销 Andrew Lucas and Tao Hsu , 五月 8, 2017 阅读详细内容（英语） Large Aqueous Primary Fluid Inclusion in Amethyst
- Amethyst from Newfoundland, Canada: Geology, Internal Features, and . . .
Amethyst is interpreted to have formed as the final stage of hydrothermal mineral deposition in the veins Variable color, zoning, and crystal size in different but contiguous crystal-lined pockets suggest relatively closed-system behavior within pockets where amethyst quartz was deposited from trapped silica- and iron-bearing hydrothermal fluid
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