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Today this tourmaline locality (type locality for dravite) at Dobrova (near Dravograd), is a part of the Republic of Slovenia. [9] Tschermak gave this tourmaline the name dravite, for the Drava river area, which is the district along the Drava River (in German: Drau , in Latin : Drave ) in Austria and Slovenia.
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 ...
Metal Largest producer Second largest producer Complete list Aluminium [6] China India List of countries by aluminium production: Bauxite [7] Australia Guinea List of countries by bauxite production
Examples include aquamarine, tourmaline, topaz, fluorite, apatite, and corundum, often along with tin, rare earth, and tungsten minerals, among others. [17] [3] Pegmatites have been mined for both quartz and feldspar. [26] For quartz mining, pegmatites with central quartz masses have been of particular interest. [26]
The mineralogy of the gem deposits varies widely with, among others, corundum (sapphire, ruby), chrysoberyl, beryl, spinel, topaz, zircon, tourmaline, garnet being common. [2] Residual deposits are mainly found in flood plains of rivers and streams. The metamorphic types of gems constitute 90% of the gem deposits in Sri Lanka.
Mine des Chico Rei Minas Gerais: Ouro Preto: Gold, huge size; also named: Encardideira Minas da Passagem Minas Gerais Mariana: Gold, they claim to be the largest gold show mine worldwide, over 30 km underground galleries, underground lake
Elon Musk said Starlink satellite internet is inactive in India, his first comments since authorities seized two of the company's devices in recent weeks, one in an armed conflict zone and another ...
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.