1) Copper mineral 2) Sulfide mineral 3) Trigonal mineral
Found on
https://www.crosswordclues.com/clue/digenite
Digenite is a copper sulfide mineral with formula: Cu9S5. Digenite is a black to dark blue opaque mineral that crystallizes with a trigonal - hexagonal scalenohedral structure. In habit it is usually massive, but does often show pseudo-cubic forms. It has poor to indistinct cleavage and a brittle fracture. It has a Mohs hardness of 2.5 to 3 and a ...
Found on
http://en.wikipedia.org/wiki/Digenite
(Copper Sulfide) 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...
Found on
https://www.encyclo.co.uk/local/23719
No exact match found.
