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2. Tourmaline - Wikipedia

   en.wikipedia.org/wiki/Tourmaline

   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.

3. 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. Elbaite forms three series, with dravite, with fluor-liddicoatite, and with schorl.

4. Rubellite - Wikipedia

   en.wikipedia.org/wiki/Rubellite

   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 ...

5. Cornubian batholith - Wikipedia

   en.wikipedia.org/wiki/Cornubian_batholith

   Granite at Haytor on Dartmoor Granite at Rough Tor on Bodmin Moor Granite outcrop at Land's End Granite at Trenemene, part of the Western Rocks, Isles of Scilly The individual plutons that comprise the Cornubian Batholith can be broadly subdivided into five main lithologies: Two mica, Muscovite, Biotite, Tourmaline and Topaz granites, each ...

6. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Paraiba Tourmaline has become one of the most popular gemstones in recent times thanks to its color and is considered to be one of the important gemstones after rubies, emeralds, and sapphires according to Gübelin Gemlab. Even though it is a tourmaline, Paraiba Tourmaline is one of the most expensive gemstones. [31]

7. 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).