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  • Cover of Gems & Gemology Winter 1991 issue, featuring silver gemstone encrusted mask

Winter 1991

  • $15.00
The PDF version of this issue is available at no charge. Visit www.gia.edu

Marine Mining of Diamonds Off the West Coast of Southern Africa
John J. Gurney, Alfred A. Levinson, and H. Stuart Smith

Sunstone Labradorite from the Ponderosa Mine, Oregon
Christopher L. Johnston, Mickey E. Gunter, and Charles R. Knowles

Curves and Optics in Nontraditional Gemstone Cutting
Arthur Lee Anderson

An Examination of Nontransparent "CZ" from Russia
Robert C. Kammerling, John I. Koivula, Robert E. Kane, Emmanuel Fritsch, Sam Muhlmeister, and Shane F. McClure

1991 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.

SKU: 91w