Minerals and Metals in Ancient India v2.c47.126
Minerals and Metals in Ancient India v2.c47.126
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v2.c47.126
*Quartz* : SiO₂. Hardness 7. Many colours due to impurities. Name from Saxon word querkluftertz, meaning cross-veined ore.
Minerals and Metals in Ancient India v2.c47.126
*Quartz* : SiO₂. Hardness 7. Many colours due to impurities. Name from Saxon word querkluftertz, meaning cross-veined ore.