Cuprotungstite

Formula:  Cu3(WO4)2(OH)2

Origin of name:  From copper (Latin cuprum) and tungsten

 

Crystal system:  Tetragonal

Crystal class:  422

Twinning:

Unit cell:

 

Colour:  Brownish green, yellowish green to emerald

Diaphaneity:

Luster:  Vitreous, waxy, dull

Habit:  Massive, friable to compact, crusts; coalesced to botryoidal globules to 0.2 mm at New South Wales location

Hardness:

Specific gravity:  7.06

Cleavage:

Tenacity:

Streak:  Greenish yellow to greenish gray

 

Synonyms/varieties:

 

Comments:

 

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