Purana . The nine are enumerated as the Oyster Pearl, Conch Pearl, Cobra Pearl, Boar Pearl, Elephant Pearl, Bamboo Pearl, Whale Pearl, Fish Pearl, and Cloud Pearl. These gems were later documented in the treatise Brihat-Samhita ("The Great Compilation") of Varahamihira , the Indian mathematician. UKT: The following is from: http://www.agt-gems.com/NavaMoti.html