Mineralpedia Details for Scheelite

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Scheelite

Formula: CaWO₄
Crystal System: Tetragonal
Crystal Habit: Massive - Granular, Disseminated, Columnar
Cleavage: Distinct, None, None
Luster: Vitreous (Glassy)
Color: colorless, white, pale yellow, brownish yellow, reddish yellow
Streak: white
Class: Tetragonal - Dipyramidal
Fracture: Uneven
Hardness: 4-5
WebMineral: View Scheelite
Mindat: View Scheelite

Scheelite from Tae Hwa mine, Chungju, Chungcheongbukdo, South Korea

Special Info: Fluorescent

Octahedral purple Scheelite crystal to 1.3cm on edge. Intense blue FL under SW.

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Scheelite from Trumbull, Fairfield Co., Connecticut, United States

Special Info: Fluorescent

Massive chunk with colorless large sections of Scheelite to 3cm. Very nicely fluorescent blue.

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Scheelite from Eulytin, Val'kumey deposit, Chukchi Penninsula, Russia

Special Info: Fluorescent

Orange large 1-2cm semi-octahedral crystals of Scheelite with dull black Cassiterite crystals to 9mm.

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Scheelite from Brunswick mine, Grass Valley dist., Nevada Co., California, United States

Special Info: Fluorescent

Yellowish brown crystalline areas. The Scheelite is strongly and vividly fluorescent!

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Scheelite from Mt Xuebaoding, Pingwu Co., Mianyang, Sichuan prov., China

Exceptional double crystal of bright orange Scheelite to 2.7cm across. The tips of corners are gemmy. Comes with an old Chinese label.

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Scheelite from Old Mine Park, Long Hill, Trumbull, Fairfield Co., Connecticut, United States

This specimen seems to be of metamorphic paragenesis, perhaps a skarn. The matrix consist of moslt clinoziosite. The Scheelite can be readily seen as white zones in delineations and are strongly fluorescent.

This deposit was apparently the first tungten deposit to be mined in the US. An excellent summary can be read on Mindat here. I will quote an interesting portion of this reference:

"This locality (a town park), like the neighboring Old Mine Plaza (now Home Depot), is unique in Connecticut for its varied mineralogy and the area was prospected since the early 19th century. The park encompasses a number of unrelated deposits with separate prospecting and mining history and mineralogy. The town of Trumbull took the property in lieu of back taxes on October 4, 1937 and named it Old Mine Park on January 4, 1940 (Sullivan, 1985). When opened, the town parks commissioner wrote that the “portion of it which was formerly worked and exposed during mining operations will be left open to residents and non-residents who are interested in Geology or Mineralogy for the study and removal of specimens” (Whitney, 1938). Collecting is no longer allowed, however."