1) Iron mineral 2) Monoclinic mineral 3) Sodium mineral
Found on
https://www.crosswordclues.com/clue/omphacite
Omphacite is a member of the pyroxene 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 pyroxene. Omphacite compositions are intermediate between calcium-rich augite and sodium-rich jadeite. It crystallizes in the monoclinic system with prismatic, typically twin...
Found on
http://en.wikipedia.org/wiki/Omphacite
(from the article `pyroxene`) Omphacite is restricted in occurrence to the high-pressure and high-temperature rocks called eclogites. Eclogites represent the most deep-seated ...
Found on
http://www.britannica.com/eb/a-z/o/17
No exact match found.
