Minerals and Metals in Ancient India v2.c47.123
Minerals and Metals in Ancient India v2.c47.123
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v2.c47.123
*Pyrite* : FeS₂. Pale brass yellow. Metallic luster, splendent to glistening. Hardness 6-6.5. Harder than chalcopyrite. Associated with copper and gold. On the surface altered to a cellular mass of limonite, on iron gossan and sulphuric acid, usually by bacterial action. The name pyrite is derived from fire, and alludes to the sparks formed when the mineral is struck with a hammer.