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Information × Registration Number 0207U010255, 0107U012743 , R & D reports Title Study of the main factors of influence on control over turnover of the precious stones and jewellery. popup.stage_title Head Belichenko O., Registration Date 10-01-2008 Organization State Gemmological Centre of Ukraine popup.description2 The purpose of the study is the research and generalization of quality characteristics which are used in expert gemological practice, as the main factor to influence the prices. The list of parameters for quality determination is developed. Main approaches to the quality determination problem are formulated, basing on the example of quality characteristics research of Ukrainian quartz, topaz and beryl. Product Description popup.authors popup.nrat_date 2020-04-02 Close