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  2. Tourmaline - Wikipedia

    en.wikipedia.org/wiki/Tourmaline

    Two dark-green rectangular tourmaline stones and one oval tourmaline stone Bi-chromatic tourmaline crystal, 0.8 inches (2 cm) long Tourmaline mineral, approximately 10 cm (3.9 in) tall. Tourmaline has a variety of colors.

  3. Gemstones of Pakistan - Wikipedia

    en.wikipedia.org/wiki/Gemstones_of_Pakistan

    In 1979, Gemstones Corporation of Pakistan was established to develop the gemstones sector in Pakistan, however in 1997 the corporation liquidated. [3] Now a number of organizations are working in this sector including All Pakistan Commercial Exporters Association of Rough & Unpolished Precious and Semi Precious Stones (APCEA) and Pakistan Gems and Jewellery Development Company (PGJDC).

  4. Gemstone - Wikipedia

    en.wikipedia.org/wiki/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 ...

  5. Elbaite - Wikipedia

    en.wikipedia.org/wiki/Elbaite

    Elbaite, a sodium, lithium, aluminium boro-silicate, with the chemical composition Na(Li 1.5 Al 1.5)Al 6 Si 6 O 18 (BO 3) 3 (OH) 4, [4] is a mineral species belonging to the six-member ring cyclosilicate tourmaline group.

  6. List of minerals - Wikipedia

    en.wikipedia.org/wiki/List_of_minerals

    Crystal of titanite with adularia and minor clinochlore on matrix Fluorite crystal sitting beside a glassy, dark green tourmaline crystal, which itself sits atop a green tourmaline of a lighter color. All sit on a bed of sparkly, bladed stark white albite Crystals of turquoise, from Copper Cities Mine, Globe-Miami District, Arizona, USA

  7. Gemstones in the Bible - Wikipedia

    en.wikipedia.org/wiki/Gemstones_in_the_Bible

    Black Onyx Onyx. Onyx - Hebrew שֹׁהַם‬‎ shoham, Greek ὀνύχινος onychinos, Latin lapis onychinus. The eleventh stone of the breastplate in the Hebrew and the Vulgate (Exodus 28:20, 39:13), representing the tribe of Joseph. In the Septuagint it is the twelfth stone and the fifth in Ezekiel 28:13 in the Hebrew, but the twelfth ...

  8. Pegmatite - Wikipedia

    en.wikipedia.org/wiki/Pegmatite

    Pegmatite with blue corundum crystals Pegmatite containing lepidolite, tourmaline, and quartz from the White Elephant Mine in the Black Hills, South Dakota Proterozoic pegmatite swarm in the headwall of the cirque of a small mountain glacier, northeastern Baffin Island, Nunavut

  9. Spinel - Wikipedia

    en.wikipedia.org/wiki/Spinel

    Light blue synthetic spinel is a good imitation of aquamarine beryl, and green synthetic spinel is used as an emerald or tourmaline simulant. [29] By 2015, transparent spinel was being made in sheets and other shapes through sintering. [30]

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