History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c17.s3.t4.8

v1.c17.s3.t4.8

During the first century A.D., the precise source of the Indian diamonds was not known to the Roman traders, but later Ptolemy reported the diamonds coming from Sambalpur (Sabarae), the Sank branch of the Brahmani river, the Kośa or Kośala (panna) etc.