Gemstones Guide to Precious & Semi Precious Stones – Tagged "quartz"
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Citrine is any quartz crystal or cluster that is yellow or orange in color

Citrine is any quartz crystal or cluster that is yellow or orange in color

Citrine is any quartz crystal or cluster that is yellow or orange in color. Although often cut as a gemstone, citrine is actually somewhat rare in nature. Most citrines on the market have been heat treated. Specimens of low grade, inexpensive amethyst or smoky quartz are often cooked at high temperatures to produce the more profitable orange yellow citrine. Citrines whose colors have been produced by artificial means tend to...

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.An Overview of Amethyst

.An Overview of Amethyst

Amethyst is a purple variety of quartz often used as an ornament. The name comes from the Greek a ("not") and methustos ("to intoxicate"), 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.   Composition Amethyst is composed of an irregular superposition of alternate lamellae of...

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