Kosmochlor
A variety of Minerals

What is Kosmochlor?
Kosmochlor is a rare chromium sodium clinopyroxene with the chemical formula NaCrSi2O6. The name is from German kosmisch, for its occurrence in meteorites, and the Greek chlor, for green. It was first reported in 1897 from the Toluca meteorite, Jiquipilco, Mexico. It occurs as a major constituent of some jadeitites and as an accessory mineral of some iron meteorites. Associated minerals include cliftonite (graphite), chromian diopside, troilite at Toluca; daubreelite, krinovite, roedderite, high albite, richterite, chromite (Canyon Diablo); and jadeite, chromite and chlorite (Burma).
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Kosmochlor Localities Map
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Quick Facts
Physical Properties
- Color
- emerald green
- Hardness (Mohs)
- 6
- Streak
- pale green
Chemical Properties
- Chemical Formula
- NaCrSi2O6
- Elements
- Cr, Na, O, Si
Also Known As

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