Processing of gem minerals

Abstract

The processing of Gem Minerals includes identification, selection for variety and grading for quality, size and use etc. It also includes identification of rare stones, identification and selection of stones which need to be treated (heat or otherwise) prior to cuttiug, polishing and other forms of treatment. The author also stresses the following The various stages of cutting and polishing, carving of ornamental items, making abrasives, grading and grouping of cut and polished stones for marketing to the traders, related industries or to the ultimate user