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 ?
47 carats, dominate the piece, while the two cushion-cut amethysts in the mounting create a complex play of light and hue.
Amethysts faceted into perfect almond shapes sway within a frame that is pave with round-cut diamonds and drips, at the bottom, with marquise- and oval-cut amethysts.
Stauer smashes the luxury status quo with the release of our FREE* 200-Carat Lasso Amethyst Necklace.
Their unique shape is captured in stunning detail in two rings featuring a sinuous, linear setting encrusted with turquoises or amethysts in slightly rounded, exclusive cuts.
Widower Robert, 82, who lives in the town, said yesterday: "Mary didn't want her grave to look like all the others and would have loved the amethysts.
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.
The sale, at Apsley Road, Clifton, on July 18 includes some fine amethyst set pieces.
Most of the amethysts on the international market come from Zambia or Brazil.
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).
The rich color of Guerrero amethysts brings good prices on the gem rough market.
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.
The locality designation for the wonderful Las Vigas amethysts was originally given simply as "Mexico," and later "Veracruz," eventually supplemented at last with the regional name "Las Vigas.