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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.
In December, 2009, a new Mineral Resources Act was passed which, among other changes, created a legal system for small-scale exploration and mining of minerals. These provisions were specifically and exclusively designed to allow Greenlanders to obtain mining rights with a simplified system and reduced fees.
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).
Unregulated mining activity can also cause depletion of natural resources, thus diminishing the prospects for sustainable development. [54] The environmental impact of gemstone mining not only poses a threat to ecosystems but also undermines the long-term viability of the industry by diminishing the quality and quantity of available resources.
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.
In 2019, Brazil's figures were as follows: it was the world's largest producer of niobium (88.9 thousand tons); [2] the 2nd largest world producer of tantalum (430 tons); [3] the 2nd largest world producer of iron ore (405 million tons); [4] the 4th largest world producer of manganese (1.74 million tons); [5] the 4th largest world producer of bauxite (34 million tons); [6] the 4th largest ...
Mineral resources of Afghanistan in 1948 (Map of the Central Intelligence Agency) The last mining boom in Afghanistan was over 2,000 years ago in the era of Alexander the Great, when gold, silver and precious stones were routinely mined. Geologists have known of the extent of the mineral wealth for over a century, as a result of surveys done by ...
Region Image Mineral Notes Ref; Khushab District: Bauxite: The bauxite is best developed from Nilawahn to Khura in the south of the Salt Range.In general the content of alumina and silica has inverse relationship from east to west.