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Amethyst Gemstone - Febraury Birthstone.


Amethyst Gemstone is Febraury Birthstone.

Amethyst is a violet variety of quartz used in jewelry.

Amethyst, comes from the Ancient Greek a- (“not”) and methustos (“intoxicated”), a reference to the belief that the stone protected its owner from drunkenness; the ancient Greeks and Romans wore amethyst and made drinking vessels of it in the belief that it would prevent intoxication.

Chemistry – SiO2

Amethyst is the violet variety of quartz; its chemical formula is SiO2.

In the 20th century, the color of amethyst was attributed to the presence of manganese.

However, since it is capable of being greatly altered and even discharged by heat, the color was believed by some authorities to be from an organic source. Ferric thiocyanate was suggested, and sulfur was said to have been detected in the mineral.

More recent work has shown that amethyst’s coloration is due to ferric iron impurities.

Further study has shown a complex interplay of iron and aluminium is responsible for the color.

On exposure to heat, amethyst generally becomes yellow, and much of the citrine, cairngorm, or yellow quartz of jewelry is said to be merely “burnt amethyst”.

Synthetic amethyst is made to imitate the best quality amethyst. Its chemical and physical properties are so similar to that of natural amethyst that it can not be differentiated with absolute certainty without advanced gemological testing (which is often cost-prohibitive).

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Posted: January 18, 2010

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