History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c16.s6.3
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c16.s6.3
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v1.c16.s6.3
(iii) Use of Cobalt : Its earliest use in India is attested in glass beads from Rajghat datable to early centuries of Christian era (1st-3rd century A.D.) and subsequently cobalt is also reported from glasses from Mason. The percentage reported varies from 0.01 to 1.90%.