Specific gravity: 4.0 to 4.2
Colour: Brass to bronze-yellow
Cubanite occurs in high temperature hydrothermal veins, in pyrrhotite –
pentlandite ores in which it commonly occurs as intimate oriented
intergrowths with chalcopyrite (Webmin, HOM). It is a rare
constituent of some carbonaceous chondrite meteorites (HOM).
Associated minerals include chalcopyrite, pyrite, pyrrhotite, pentlandite and sphalerite (HOM, Mindat).
Cubanite is very sensitive to temperature, pressure and compositional variations. When heated between 200 and 210°C, cubanite transforms irreversibly to isocubanite (Mindat, HOM).
The type locality is Barracanao, Mayarí-Baracoa Belt, Holguín Province, Cuba.
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