February 04, 2018
Beautiful purple variety of quartz, its color can range from a pale lilac to deep purple. This purple gemstone is the Birthstone of February.
The name meaning of Amethyst comes from a Greek word Amethystos (not intoxicated).
Its good hardness and affordable price makes the Amethyst an attractive gem for use in jewelry.
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Its name comes from the Greek word AMETHYSTOS (not intoxicated), it evokes the color of the wine to which water has been added to limit their negative effects.
Amethyst Gemstones commonly show color zoning, consisting in angular zones of darker to lighter color. The color of amethyst is caused by the presence of color centers and iron.
"Rose de France" is the comercial name for pale lilac Amethyst and it is very popular in jewelry.
Violet amethyst is the "sister gemstone" of yellow citrine. Ametrine is the combination of amethyst and citrine, with its typical color-zone.
Until 18th Century was included in the most valuable gemstones, until the discovery of extensive deposits. The effect that large sizes has on the price of amethyst gemstones is less than other gemstones.
The biggest factor in the value of the Amethyst Gemstones is the COLOR.
The highest grade amethyst color have a rich velvety slight bluish purple with red and blue flashes commonly called “Siberian Amethyst” or “Deep Siberian Amethyst” (these terms refer to the color, not the origin).
They are also highly valued the amethyst color strong reddish purple without color zoning and without brown hue.
Amethyst cut stones are available in a wide variety of shapes. Apart of convencional cut, we can find fancy cuts as customer taste.
As amethyst were reserved for ROYALTY, we can find Amethyst Gemstones in the British Crown Jewels or on the Swedish Crown Collection.
We can find big CRYSTALS of Amethyst Gemstones in Texas Memorial Museum (amethyst geode of 250 pound) and GIA Museum exhibits a 164 pounds crystal.
Typical inclusions: The main inclusions in amethysts are the called “zebra stripes”, primary fluid inclusions describing the faces of the rhombohedron.
We also can find “color zoning” angular zones of darker and lighter color, and Brazilian Law Twinning.
Two-phase inclusions. Solid Inclusions.
GENESIS: Volcanic igneous rocks and pegmatites. Geodes. Alluvial deposits.
Amethyst gemstones are found: Afghanistan, Bolivia, Brazil, Burma (Myanmar), Canada, Cambodia, India, Kenya, Madagascar, Mexico, Namibia, Nigeria, Peru, Russia, South Korea, Sri Lanka, Uruguay, Usa ...
Belleau, the poet, gives life as the chaste maiden who does not succumb to the charms of Bacchus and whom Diana becomes the white stone, sprinkled by the repentant wine Bacchus.
Saint Valentine wore an amethyst ring with the image of Cupid.
Amethyst gemstones are the birthstone of February, for Pisces, and for the 6th anniversary of marriage.
More information about Birthstones.
Zebra stripes. Liquid inclusions
TECTOSILICATES, SILICATES GROUP
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November 01, 2018
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