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Amethyst is a purple variety of quartz (SiO. 2) and owes its violet color to irradiation, impurities of iron (Fe3+. ) and in some cases other transition metals, and the presence of other trace elements, which result in complex crystal lattice substitutions. [2][3][4] The irradiation causes the iron Fe3+.
Aquamarine. “Aquamarine is a calming gemstone that symbolizes fluidity and flow, healing, allowance, and acceptance of what is,” Salzer says. “Look for clarity and luminosity in an ...
Gadolinite; Gahnite; Gahnospinel; Garnet group: Pyralspite. Almandine; Pyrope; Spessartine; Ugrandite. Andradite. Demantoid; Melanite; Topazolite; Grossular ...
An amethyst stone from South Africa. Amethyste or Amethystos (Ancient Greek: Ἀμέθυστη, romanized: Améthustē, lit. 'non-drunk') is supposedly a nymph in Greek mythology who was turned into a precious stone by the goddess Diana/Artemis in order to avoid a worse fate at the hands of the god Dionysus, thus explaining the origin of the semi-precious stone amethyst.
Opals. Andamooka Opal, presented to Queen Elizabeth II, also known as the Queen's Opal. Flame Queen Opal. Galaxy Opal. Halley's Comet Opal, the world's largest uncut black opal. Olympic Australis Opal, reported to be the largest and most valuable gem opal ever found.
Ametrine, also known as trystine or by its trade name as bolivianite, is a naturally occurring variety of quartz. It is a mixture of amethyst and citrine with zones of purple and yellow or orange. Almost all commercially available ametrine is mined in Bolivia. The colour of the zones visible within ametrine are due to differing oxidation states ...
Charoite (/ tʃæroʊ.aɪt / CHAR-ow-ait) is a rare silicate mineral with the chemical composition K (Ca,Na)2Si4O10(OH,F)•H2O, first described in 1978. It is named after the Chara River, despite its being 70 kilometres (43 mi) away from the discovery place. [ 6 ][ 3 ] When it was discovered, it was thought to be a fake, dyed purple to give it ...
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 term has largely fallen out of use.
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