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Sugilite (/ ˈ s uː ɡ ə l aɪ t,-dʒ i-/ SOO-gə-lyte, -jee-) [2] [3] is a relatively rare pink to purple cyclosilicate mineral with the complex chemical formula K Na 2 (Fe, Mn, Al) 2 Li 3 Si 12 O 30. Sugilite crystallizes in the hexagonal system with prismatic crystals. The crystals are rarely found and the form is usually massive.
Purpurite is a manganese phosphate mineral with the formula MnPO 4, with varying amounts of iron depending upon its source. It occurs in color ranges from brownish black via purple and violet to dark red. [3] Purpurite forms a series with the iron-bearing endmember heterosite, FePO 4. [4]
The Hubbard Mine for tungsten was operated by the Rare Minerals Company from 1898 and later by the American Tungsten Mining and Milling Company, ceasing operations after a fire in 1916. [ 4 ] [ 5 ] Besides tungsten, the mine was also a source of beryl , opal , topaz , tourmaline and 60 other crystals and minerals in varying quantities.
Last week I offered a very basic look at the field of rare-earth minerals. Today I'll cover what the competitive landscape looks like should you consider investing in the field. If you'll recall ...
Blue John (also known as Derbyshire Spar) is a semi-precious mineral, a rare form of fluorite with bands of a purple-blue or yellowish colour. In the United Kingdom it is found only at Blue John Cavern and Treak Cliff Cavern at Castleton in Derbyshire. During the 19th century, it was mined for its ornamental value, and mining continues on a ...
In 2008, Chevron sold the mine to privately-held Molycorp Minerals LLC, a company formed to revive the Mountain Pass mine. Molycorp announced plans to spend $500 million to reopen and expand the mine, and on July 29, 2010, it raised about $400 million through an initial public offering , selling 28,125,000 shares at $14 under the ticker symbol ...
Norway just struck a gold mine. Well, a rare mineral mine. The Norwegian mining company, Rare Earths Norway, just uncovered the largest deposit of rare earth elements in Europe. The discovery has ...
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