amethyst

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amethyst

(ăm`əthĭst) [Gr.,=non-drunkenness], variety of quartzquartz,
one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2.
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, violet to purple in color, used as a gem. It is the most highly valued of the semiprecious quartzes. It is associated with a number of superstitions, being regarded as a love charm, as a potent influence in improving sleep, and as a protection against thieves and drunkenness. Brazil, Uruguay, Siberia, Sri Lanka, and parts of North America are important sources of supply. The so-called Oriental amethyst, or purple sapphire, is not quartz but a variety of corundum, a much harder and rarer stone.

Amethyst

 

a mineral, a violet or sky blue-violet variety of quartz (SiO2). On heating to 300–350°C, amethyst becomes yellow or is discharged. Decolorized amethyst reacquires its color after exposure to X rays. The mineral occurs in quartz veins, granitic rocks, amygdules of volcanic rocks, and sometimes in sedimentary rocks, such as silicon salts. The best specimens are used for jewelry and as ornamental stones. Especially fine are amethysts from the Urals and Brazil. A blue-violet variety of corundum is known in the jeweler’s craft as eastern amethyst.

amethyst

[′am·ə‚thist]
(mineralogy)
The transparent purple to violet variety of the mineral quartz; used as a jeweler's stone.

amethyst

February. [Am. Gem Symbolism: Kunz, 319–320]

amethyst

preserved soldiers from harm; gave them victory. [Gem Symbolism: Kunz, 58]

amethyst

provides protection against drunkenness; February birthstone. [Gem Symbolism: Kunz, 58–59]

amethyst

1. a purple or violet transparent variety of quartz used as a gemstone. Formula: SiO2
2. a purple variety of sapphire; oriental amethyst
3. the purple colour of amethyst
References in periodicals archive ?
The cocktail rings in Mimi's Talita collection features irregular-shaped amethysts and purple sapphires inspired by the sublimely, sensual colours of orchids, while London blue topaz and blue sapphires come together to celebrate the starry nights typical of the southern hemisphere offering in turn a veritable treasure trove of jewels for discerning women this season.
Brazilian retail jeweler Vivara sells a wide range of jewels set with Brazilian gemstones, such as amethysts, quartz and citrine, at more accessible price points, at its shop in Iguatemi.
One Tiffany amethyst ring set in 18-carat gold was on sale for 6,100 reais ($3,935).
The sale, at Apsley Road, Clifton, on July 18 includes some fine amethyst set pieces.
In the late 18th/early 19th century, the amethyst enjoyed its most favoured period when, due to its apparent rarity, the stones were both very expensive and highly regarded.
In their sale in April, Dreweatt Neate sold a 19th-century amethyst necklace, set in gold and in its original box, for pounds 2,000.
Most of the amethysts on the international market come from Zambia or Brazil.
Amethyst Mine Panorama has been selected as a Rand McNally & Co.
Choose from four lip glosses in Golden Gem, Brown Opal, Ruby Rich and Amethyst Sparkle (pounds 15), three enhancing papers in Sheer Lilac, Sheer Peach or Sheer Bronze (pounds 12) or the Makeup Brilliant limited edition Colour Palette (pounds 30).
McGinnis, stated that, "In order to focus on operations, we determined that management time could be better spent on future growth by putting the unfortunate circumstances of the Amethyst oil rig construction behind us.
While the Lunari collection offers drop-gorgeous earrings and rings boasting bold and accented looks blending black gold with black diamonds and multi-hued gemstones, its Geode collection 'ups' the style quotient with its sumptuous stud earrings and ring collection featuring white and rose gold settings with white diamonds, pink sapphires, yellow sapphires and amethysts.
In its stud earrings and dramatic rings, white and rose gold partner white diamonds, pink and yellow sapphires with amethysts to recreate the raw beauty of geodes.