Sphalerite, cassiterite (tin ore) and scheelite are only a few examples of this type of brittle mineral ore (see Table). From Wordnik.com. [Chapter 20] Reference
Tungsten is retrieved from the ore minerals scheelite (CaWO4, calcium tungstate) and wolframite ((Fe, Mn) WO4, iron-manganese tungstate). From Wordnik.com. [Tungsten] Reference
(As an aside, the mineral scheelite (Ca (WO4, MoO4), calcium tungstate-molybdate) was named after Scheele in honor of his discovery of molybdenum.). From Wordnik.com. [Molybdenum] Reference
Another mining sector which employs optical evaluation is scheelite mining, where the mine face is irradiated with an ultra-violet lamp which induces fluorescence of the scheelite. From Wordnik.com. [Chapter 6] Reference
This is especially important for those valuable minerals which exhibit a brittle to very brittle tenacity, such as cassiterite, sphalerite and the tungsten minerals scheelite and wolframite. From Wordnik.com. [Chapter 20] Reference
Full production ~ 400 STUs per day Mill capable of APT and high grade scheelite as market demand. From Wordnik.com. [Recently Uploaded Slideshows] Reference
Wavering hawaii beach vacations thalidomide, air frypan, sanies reimbursement, maybe gaslight scheelite and air anastalsis to economiser. From Wordnik.com. [Rational Review] Reference
Tungsten ores contain tungsten principally in the form of the minerals scheelite (calcium tungstate), ferberite (iron tungstate), hübnerite. From Wordnik.com. [The Economic Aspect of Geology] Reference
The main sulphide minerals are pyrite, arsenopyrite and pyrrhotite, while accessory minerals include bismuthinite, scheelite and sphalerite. From Wordnik.com. [Marketwire - Breaking News Releases] Reference
In these occurrences the tungsten mineral is almost invariably scheelite, and is associated with calcite, garnet, pyroxene, and other silicates. From Wordnik.com. [The Economic Aspect of Geology] Reference
The middle horizon, or discovery horizon, contains the majority of the significant gold intervals and has the highest concentrations of arsenopyrite, bismuthinite and scheelite. From Wordnik.com. [Marketwire - Breaking News Releases] Reference
A high grade (+65%) scheelite (WO (3)) concentrate product. From Wordnik.com. [The Earth Times Online Newspaper] Reference
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