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As amethyst is readily available in large structures, the value of the gem is not primarily defined by carat weight. This is different from most gemstones, since the carat weight typically exponentially increases the value of the stone. The biggest factor in the value of amethyst is the color displayed. [41]
Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [ citation needed ] but it has also been mined in the Lower Silesia region of Poland .
Amethyst “Amethyst is a gemstone long associated with royalty and spiritualism and is said to bring tranquility and healing,” Salzer says. “In the same color spectrum wavelength as the third ...
Heat can either improve or spoil gemstone color or clarity. The heating process has been well known to gem miners and cutters for centuries, and in many stone types heating is a common practice. Most citrine is made by heating amethyst, and partial heating with a strong gradient results in "ametrine" – a stone partly amethyst and partly citrine.
The first recorded use of amethyst as a color name in English was in 1572. [24] Faceted amethyst. Though the color of natural amethyst varies from purple to yellow, the amethyst color referred to here is the moderate purple color most commonly associated with amethyst stones. There is disagreement as to the cause of the purple color of the ...
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 hide