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Minerals and Metals in Ancient India v2.c43.s3.t2.2

Minerals and Metals in Ancient India v2.c43.s3.t2.2

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v2.c43.s3.t2.2

Buddhabhaṭṭa made an interesting statement that ruby and sapphire cannot be scratched by any mineral other than diamond and corundum (*RP*, 137); similar statements have been repeated in *GP*, 1.70.27 and *MM*, 213:

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