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Jasper, an aggregate of microgranular quartz and/or cryptocrystalline chalcedony and other mineral phases, [1][2] is an opaque, [3] impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron (III) inclusions. Jasper breaks with a smooth surface and is used for ornamentation or as ...
The modern chrysolite is a green oblong hexagonal prism of unequal sides terminated by two triangular pyramids. Topaz, or ancient chrysolite, is an octangular prism of an orange-yellow colour; it is composed of alumina, silica, hydrofluoric acid, and iron. it is found in Ceylon, Arabia, and Egypt.
Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...
Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...
The pearl was greater than an inch in diameter, of the purest white and emitted light like moonglow. In the dark it could illuminate an entire room. For these reasons it was known as "Duke Sui's Pearl" [隋侯珠] or the "Spirit Snake's Pearl" [靈蛇珠], or, again, the "Moonlight Pearl" [明月珠]. (tr. DeWoskin and Crump 1996: 239).
Durr Al Najaf (Arabic: دُر ٱلنَّجَف) is a glossy and clear gemstone from the quartz family. The name means "pearl of Najaf " as it can only be sourced from Wadi-al-Salaam (Arabic: وادي السلام, romanized: Wādī al-Salām, lit. 'Valley of Peace') in Najaf, Iraq. The gemstone is found along the west of Najaf close by the ...
It was designated the official gemstone of Lethbridge, Alberta, Canada in 2007, [2][3] and was subsequently designated as Alberta's official gemstone in April 2022. [4] Ammolite is also known as aapoak (Kainah for "small, crawling stone"), gem ammonite, calcentine, and korite. The latter is a trade name given to the gemstone by the Alberta ...
Larvikite. Polished larvikite (marketed as "Blue Pearl Granite"), showing labradorescence, is a popular decorative stone. Larvikite is an igneous rock, specifically a variety of monzonite, [1] notable for the presence of thumbnail-sized crystals of feldspar. These feldspars are known as ternary because they contain significant components of all ...
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