VAP-BK-0010 Gemstone Weight Estimation. byCharles I. Carmona.

“[A] remarkably comprehensive set of weight estimation
formulae for mounted diamonds, colored stones and
pearls...Those who appraise, buy, sell, insure, or loan on used or
estate jewelry...should consider such detailed tables a major
resource for their estimating process” (from the foreword by
Richard T. Liddicoat). Charles I. Carmona, G.G., is a working
gemologist/ appraiser who, over decades of experience, has
compiled this guide to estimating the weights of all shapes and
varieties of mounted gemstones. This is a standard reference and
a must for the workbench, desktop or library of anyone related to
the jewelry trade. Includes hundreds of black-and-white
diagrams and charts. 434 pages.