Minerals and Metals in Ancient India v2.c43.s3.t8.3
Minerals and Metals in Ancient India v2.c43.s3.t8.3
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v2.c43.s3.t8.3
Uniformly dark green chalcedony is plasma, and when spotted with red, it is known as heliotrope, or blood-stone. Now let us come to the Sanskrit literatures on the subject.