Calumetite

Formula:  Cu(OH,Cl)2 . 2H2O

Origin of name:  Locality; Calumet, Michigan

 

Crystal system:  Orthorhombic

Crystal class:  Unknown

Twinning:

Unit cell:

 

Colour:  Azure-blue to powder blue

Diaphaneity:

Luster:  Pearly on basal cleavage

Habit:  Crystals scaly in spherules and sheaves

Hardness:  2

Specific gravity:

Cleavage:  1; {001} good

Tenacity:

Streak:

 

Synonyms/varieties:

 

Comments:

 

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