Minerals

Chemical Composition

Cr (%)

Natural Occurrences

Chromite

Cr₂O₃

68.4%

Ultramafic rocks

Ferro Chromium

FeCr₂O₄

2% - 4%

Ultramafic rocks

Uvarovite

Ca₃Cr₂(SiO₄)₃

20.78%

Chromium ores

Chromdravite

NaMg₃(Cr³⁺Fe³⁺)₆(BO₃)₃SI₆O₁₈(OH)₄

20.99%

Clay carbonate rocks

Chrome diopside

Cr₂O₃

-

Chromium Ores

Picotite

(Fe, Mg) (Al, Cr)₂O₄

0.01%

Igneous rocks

Chrome ochre

Cr₂O₃

2% - 10.5%

Chromium ores

Crocoite

PbCrO₄

16.09%

Ultramafic rocks