Renowned minerology and gemology expert Sinkankas incorporates deposits discovered in the last two decades with the historical and technical data of volumes 1 and 2, published in 1959 and 1975. Keeping pace with the increased tempo of gemstone exploration, he provides new information on topics such as deposit localities, the nature, extent and productivity of those deposits, and the sizes and quantities of the gemstones produced. Gems are organized alphabetically, and occurrences are arranged by geographical and political ...

Gemstones of North America: Volume III 2003, Geoscience Press

ISBN-13: 9780945005223