- Chemistry: Cu9S5, Copper
- Class: Sulfides
- Uses: As an important ore of copper and as mineral specimens.
Digenite is an important ore of copper, although it is not very well
known even by mineral collectors. The reasons for this lack of appreciation
for digenite could be due to the fact that it does not generally form good
crystals, lacks brilliant colors and is easily confused with other copper
sulfides. But as is the case for any mineral that rarely forms good crystals,
the specimens that do show good crystal habit are in exceptional demand.
- Color is blue or black.
- Luster is submetallic.
- Transparency crystals are opaque.
- Crystal System is isometric.
- Crystal Habits are limited to mostly massive and granular components
of massive sulfide rocks, but a few localities have produced good crystals.
- Hardness is 2.5 - 3
- Specific Gravity is approximately 5.6 (above average for metallic
- Associated Minerals include pyrite,
- Notable Occurrences include many mines around the world that
contain copper sulfides such as in Sweden; Australia; South-West Africa
and several copper mines in Arizona, Butte Montana and Kennecott, Alaska,
- Best Field Indicators are color, associations, softness and