History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c17.s3.t4.12
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c17.s3.t4.12
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v1.c17.s3.t4.12
Agate and carnelian were mined, processed and used even in the Pre-Harappan times. Yellowish varieties containing hydrated ferric oxide used to be dehydrated on heating and thus reddened to beautiful carnelian in an age-old practice. The best known deposits are found in the Rajpila hills at Ratanpur, on the lower Narmada river.