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Rubellite is the red or pink variety of tourmaline and is a member of elbaite. Rubellite is also the rarest gem in its family. [2] It is occasionally mistaken for ruby. [3] These gems typically contain inclusions. [4] Notable countries where rubellite can be mined include Afghanistan, Brazil, Madagascar, Myanmar, Nigeria, Russia, and the United ...
Gem and specimen tourmaline is mined chiefly in Brazil and many parts of Africa, including Tanzania, Nigeria, Kenya, Madagascar, Mozambique, Malawi, and Namibia. It is also mined in Asia, notably in Pakistan, Afghanistan, and Indonesia as well as in Sri Lanka and India, [25] where some placer material suitable for gem use is found.
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. Elbaite forms three series, with dravite, with fluor-liddicoatite, and with schorl.
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...
Wargaming was founded by Victor Kislyi in Minsk on 2 August 1998, [3] intending the company as a developer of strategy video games. [4] The company's first project was DBA Online—the digital version of a miniature tabletop rule set De Bellis Antiquitatis—launched in 2000.
The ZTR index is a method of determining how weathered, [1] both chemically and mechanically, a sediment (or a corresponding sedimentary rock) is. The letters in ZTR stand for three common minerals found in ultra-weathered sediments: zircon , tourmaline , and rutile .
Foitite is a mineral in the tourmaline group, [2] it is a vacancy-dominant member of the group. [3] Foitite is in the 'vacancy' group, due to the absence of atoms in the X site. [2] According to the Czech Geological Society, foitite is rare. [4]
Gemstones have been found in Greenland, including diamond, ruby, sapphire, kornerupine, tugtupite, lapis lazuli, amazonite, peridot, quartz, spinel, topaz, and tourmaline. [1] Most of Greenland's ruby and sapphire occurrences are located near the village of Fiskenaesset/ Qeqertarsuatsiaat on the southwest coast.