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Amethyst. Amethyst is a violet variety of quartz. The name comes from the Koine Greek Ī±Ī¼ĪĪøĻ ĻĻĪæĻ amethystos from Ī±- a-, "not" and Ī¼ĪµĪøĻĻĪŗĻ ( Ancient Greek) methysko / Ī¼ĪµĪøĻ metho ( Modern Greek ), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. [ 1]
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
Gemstone irradiation is a process in which a gemstone is artificially irradiated in order to enhance its optical properties. High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [ 1] As a result, the gemĀstone's color may be significantly ...
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 ...
The five cardinal gems. Clockwise from top: sapphire, ruby, emerald, amethyst, diamond. Cardinal gems are gemstones which have traditionally been considered precious above all others. The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use as well as rarity. [ 1]
The first theme is using legendary luminous gems to illuminate buildings, for navigation lights on ships, or sometimes as guiding lights for lost persons (Ball 1938: 498ā500). In India, the earliest country in which fine gemstones were known, belief in luminous gems dates back some twenty-five centuries.
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