January 30, 2017
Amethyst Gemstones, King's Gems.
Beautiful and sober purple variant quartz. Amethyst gems are present in myths and symbols.
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.
Violet amethyst is the "sister gemstone" of yellow citrine. Ametrine is the combination of amethyst and citrine, with its typical color-zone.
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The biggest factor in the value of the Amethyst Gemstones is the COLOR.
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.
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.
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.
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 ...
Heated at 450 C losses its violet color and turns yellow - orange and then resemble the citrine. The original color can be restored by x-ray radiation.
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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