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Mineralati

Minerals

Omphacite

omphacite

(Ca,Na)(Mg,Fe,Al)Si2O6

Omphacite Mineral Specimen For Sale

Omphacite Mineral Specimen For Sale — via www.dakotamatrix.com · Source

Overview

Omphacite is a member of the clinopyroxene group of silicate minerals with formula: (Ca, Na)(Mg, Fe2+, Al)Si2O6. It is a variably deep to pale green or nearly colorless variety of clinopyroxene. It normally appears in eclogite, which is the high-pressure metamorphic rock of basalt. Omphacite is the solid solution of Fe-bearing diopside and jadeite. It crystallizes in the monoclinic system with prismatic, typically twinned forms, though usually anhedral. Its space group can be P2/n or C2/c depending on the thermal history. It exhibits the typical near 90° pyroxene cleavage. It is brittle with specific gravity of 3.29 to 3.39 and a Mohs hardness of 5 to 6.

Scientific references

  1. Omphacite — Wikidata. https://www.wikidata.org/wiki/Q745864 Link
  2. Omphacite — Wikipedia. https://en.wikipedia.org/wiki/Omphacite Link