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Investing in #Tungsten
I start off each series on investing in a different metal talking about mineralogy – this will be no different! There are 2 commercially valuable mineral types in tungsten – scheelite (calcium tungstate) and the wolframite series (iron-manganese tungstate.)
Scheelite is generally speaking easier and cheaper to recover than wolframite, mainly because it is recoverable via gravity and flotation means whereas wolframite only by gravity. Scheelite fluoresces which can make a trip to an underground #tungsten mine very interesting!
Both scheelite and wolframite are brittle meaning that they are liable to produce unrecoverable slimes during processing. These #tungsten minerals have a very high specific gravity though, of 6 g/cm3 and 7 g/cm3 respectively, making gravity separation relatively simple.
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