
1) Copper mineral 2) Mineral 3) Monoclinic mineral
Found on
https://www.crosswordclues.com/clue/olivenite

Olivenite is a copper arsenate mineral, formula Cu2AsO4OH. It crystallizes in the monoclinic system (pseudo-orthorhombic), and is sometimes found in small brilliant crystals of simple prismatic habit terminated by domal faces. More commonly, it occurs as globular aggregates of acicular crystals, these fibrous forms often having a velvety lustre; s...
Found on
http://en.wikipedia.org/wiki/Olivenite

• (n.) An olive-green mineral, a hydrous arseniate of copper; olive ore.
Found on
http://thinkexist.com/dictionary/meaning/olivenite/
O·liv'en·ite noun (Min.) An olive-green mineral, a hydrous arseniate of copper; olive ore.
Found on
http://www.encyclo.co.uk/webster/O/17

Olivenite is a rare olive-green, brown or yellow coloured secondary mineral found in deeply weathered, highly concentrated copper sulphide ore bodies. It is a hydrous arsenate of copper confirmed as a distinct species in 1820 and sometimes mined as a copper ore. Olivenite has a relative hardness of 3.
Found on
http://www.probertencyclopaedia.com/browse/HO.HTM

[
n] - rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits
Found on
http://www.webdictionary.co.uk/definition.php?query=olivenite
noun rare green to black mineral consisting of hydrated copper arsenate that is found in copper deposits
Found on
https://www.encyclo.co.uk/local/20974

Basic copper arsenate, Cu
2AsO
4(OH), occurring as a mineral in olive-green prisms
Found on
https://www.encyclo.co.uk/local/21221
No exact match found.