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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. Naturally occurring prasiolite has also been found in the Thunder Bay area of ...
The stone must be at least one million years old to be classified as amber, and some amber can be up to 120 million years old. Amethyst Amethyst has historically been the most prized gemstone in the quartz family. It is treasured for its purple hue, which can range in tone from light to dark. Emerald
Amethyst is a violet variety of quartz. The name comes from the Koine Greek αμέθυστος amethystos from α- a-, "not" and μεθύσκω ( Ancient Greek) methysko / μεθώ metho ( Modern Greek ), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. [1] Ancient Greeks wore amethyst and carved ...
Present, dichroism or trichroism, depending on heat treatment. Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate ), caused by small amounts of vanadium. [3] Tanzanite belongs to the epidote mineral group. Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a ...
Lapis is the Latin word for "stone" and lazulī is the genitive form of the Medieval Latin lazulum, which is taken from the Arabic لازورد lāzaward, itself from the Persian لاژورد lāžavard/lāževard and/or لاجورد lājevard. It means "sky" or "heaven"; so this is a "stone (of/from) the sky" or "stone (of/from) heaven". [11]
The amethyst is a brilliant transparent stone of a purple colour and varies in shade from violet purple to rose. There are two kinds of amethysts: the oriental amethyst, a species of sapphire that is very hard (cf. Heb.,hlm), and when colourless is almost indistinguishable from the diamond. The occidental amethyst is of the silex family and is ...
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