Minerals and Metals in Ancient India v2.c43.s3.t9.2
Minerals and Metals in Ancient India v2.c43.s3.t9.2
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v2.c43.s3.t9.2
Nephrite belongs to the amphibole group (double chain in the molecular level) whereas jadeite and chloromelanite belong to the single chain of pyroxene group. Nephrite may be white or green, due to iron and manganese. Apple-green or emerald green jadeite is so coloured, due to the presence of chromium. Black colour of chloromelanite is due to excess concentration of iron in the structure.