Scheelite Occurrence, Localities and Origins

Occurrence, Localities and Origins:

Occurs in connection with the tin deposits of Bohemia, Saxony and Cornwall; in quantity in New South Wales and Queensland. Found in the United States at Trumbull, Connecticut; at the Atolia District near Randsburg, San Bernardino County, California; near Mill City Pershing County, Nevada; near Dragoon, Cohise County, Arizona; in Lake County, Colorado; near Gage, New Mexico, where it occurs with pyrite and galena in a vein cutting limestone, and in the placer gravels at Nome, Alaska. High perfection orange scheelite crystals suitable for mineral collectors are being mined in China.

Production. Scheelite has been mined in quantity in Idaho, Alaska, California, Nevada, Arizona, and New Mexico, as a source of tungsten, but most of this element has heretofore been produced from other compounds, mainly wolframite. For some years it was produced in large quantity near Bishop, Inyo Co., California.

Scheelite is a subordinate ore of tungsten, with wolframite furnishing the greater amount on a worldwide basis. In the US, Scheelite has been the more important source of the metal. Tungsten is used principally in the manufacture of tool steel, various steel alloys and electric furnaces. It is also employed as the filaments in electric-light bulbs, in the manufacture of sodium tungstate which is used for fireproofing cloth, as a mordant in dyeing, and for a number of other minor purposes.

 

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