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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 ...
Bastnaesite - rare earth mineral; Xenotime - rare earth mineral; Sphene; Tourmaline; Quartz of various types; Diamond; The main mining areas of these gems are in Khyber Pakhtunkhwa and Federally Administered Tribal Areas, Gilgit-Baltistan, and Balochistan. [4]
A large variety of minerals and gemstones are found in these mountains: emerald and tourmaline are found in the north, and garnet and quartz are found in the Bajaur and South Waziristan agencies. Department of Minerals is the government department working for the exploration and development of the mining industry in the region.
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]
Silicate perovskites, argentite and β-quartz are not valid minerals, as they do not occur on Earth's surface (STP). The type material of bridgmanite is from a meteorite. Some minerals are unstable on Earth's surface (metastability): diamonds, cohenite and haxonite, for instance.
Afghanistan has no local ownership requirements and its Constitution does not allow for nationalization. The 20% corporate tax rate was the lowest in the region. Afghanistan's mining industry was at a primitive artisanal stage of development; the operations were all low-scale and output was supplied to local and regional markets. The government ...
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.