Minerals and Metals in Ancient India v2.c47.129
Minerals and Metals in Ancient India v2.c47.129
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v2.c47.129
*Chalcedony*. SiO₂, nH₂O. Wax like luster. Many varieties:
Minerals and Metals in Ancient India v2.c47.129
*Chalcedony*. SiO₂, nH₂O. Wax like luster. Many varieties: