The PDF version of this issue is available at no charge. Visit www.gia.edu An Update on Imperial Topaz from the Cap„o Mine, Minas Gerais, BrazilDaniel A. Sauer, Alice S. Keller, and Shane F. McClureTrapiche RubiesKarl Schmetzer, Henry A. H‰nni, Heinz-J¸rgen Bernhardt, and Dietmar SchwarzSome Gemological Challenges in Identifying Black Opaque Gem MaterialsMary L. Johnson, Shane F. McClure, and Dino G. DeGhionnoEnstatite, Cordierite, Kornerupine, and Scapolite with Unusual Properties from Embilipitiya, Sri LankaPieter C. ZwaanSome Tanzanite ImitationsLore Kiefert and Susanne Th. Schmidt 1996 Annual Index Every issue also includes the most up-to-date reports from the GIA Laboratory (Lab Notes) and gemologists around the world (Gem News International).GIA students and alumni save 10% on back issues! Enter coupon code GGALUM at checkout. Usually ships in 3-5 business days. SKU: 439601
