Ladzhun Y. The Gemmological Appraisal and Economic Valuation of the Gemstone Rough of the Volyn Chamber Pegmatite

The dissertation focuses on the comprehensive gemmological-economic research of the gemstone rough of the Volyn chamber pegmatite. The improved techniques for gemmological-economic quality rating and predicted value of the gemstones in rough are provided. The key measurements of fragments, crystals or grains of the gemstone rough in its natural form for the gemmological appraisal are demonstrated and improved. The integrated assessment of the gemstone rough of the Volyn chamber pegmatite is done for the first time. The classification on nomenclature groups is developed for the gemmological appraisal of the gemstone rough. The factor complex for predicted quality characteristics (forecasting techniques), sizes (yield), and value for the prospected faceted stones are completed and improved. The outlines on the value determination of the gemstone rough and the final product - faceted stones determined on the base of yield calculation are developed.