11. The Graduate Gemologist ( G . G . ) diploma offers a comprehensive education in gemology . 12. Welcome to the "'assessment department "'of WikiProject Gemology and Jewelry! 13. He developed an interest in gemology and received four certificates from the Gemological Institute of America. 14. During his 15 years with Sotheby's, he also became an appraiser and studied gemology . 15. The magazine called Sisk the forth most influential person in its " Gems and gemology " sublist. 16. :See asterism ( gemology ) for stones that look like they have stars painted on them. 17. Amatya has a bachelor's degree in Gemology from the Gemological Institute of India, Bombay. 18. In gemology a different type of refractometer is used to measure index of refraction and birefringence of gemstones. 19. Tay Thye Sun has been practicing gemology after he graduated from the Gemological Institute of America since 1980. 20. Alhaj N . D . H . Abdul Caffoor became a world figure in gems and gemology .
