Chalcopyrite

General Information
Chemical Formula
CuFeS
 
2
Anthony et al, Handbook of mineralogy (2001)
Photos of natural/un-cut material from mindat.org
Physical Properties of Chalcopyrite
Mohs Hardness3.5 to 4
Anthony et al, Handbook of mineralogy (2001)
Specific Gravity4.1 to 4.3
Anthony et al, Handbook of mineralogy (2001)
Cleavage QualityPoor
Anthony et al, Handbook of mineralogy (2001)
Colour
Colour (General)Brass-yellow, may be tarnished and iridescent.
Anthony et al, Handbook of mineralogy (2001)
TransparencyOpaque
Anthony et al, Handbook of mineralogy (2001)
LustreMetallic
Anthony et al, Handbook of mineralogy (2001)
Crystallography of Chalcopyrite
Crystal SystemTetragonal
Anthony et al, Handbook of mineralogy (2001)
HabitEquant, tetrahedral-shaped crystals, may be modified by scalenohedral faces, to as large as 10 cm. Sphenoidal faces typically large, dull in luster and striated. Commonly massive, compact; can be botryoidal
Anthony et al, Handbook of mineralogy (2001)
Geological Environment
Where found:A primary mineral in hydrothermal veins, stockworks, disseminations, and massive replacements; an exsolution product in mafic igneous rocks; of sedimentary origin controlled by redox conditions.
Anthony et al, Handbook of mineralogy (2001)
Further Information
Mineral information:Chalcopyrite information at mindat.org
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