2007-01-15 13:52:21 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Amethyst is a purple variety of quartz. It is formed most often inside a geode (at least gem-quality), and the purple color comes from impurities of disputed origin. Manganese and sulfur are both considered possibilities.
2007-01-15 14:07:43 · answer #1 · answered by Hauntedfox 5 · 0⤊ 0⤋
Amethyst (SiO2) is a violet or purple variety of quartz often used as an ornament. The name comes from the Greek a (not) and methuskein ("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.
2007-01-15 22:16:19 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Amethyst is simply quartz and is known as a semi-precious stone.
2007-01-15 22:00:39 · answer #3 · answered by Brendan C 2 · 0⤊ 0⤋