有色宝石鉴定 尖晶石 尖晶石质量评价.pptx

;教育部职业教育宝玉石鉴定与加工专业教学资源库 Gems and Jade Identification and Processing Teaching Resource Library ;颜色;净度;重量;Margot McKinneys magnificent Burmese spinel and diamond pendant suspended from natural colour pink pearls, with a pink pearl drop ($850,000).;This majestic Antique Imperial spinel, pearl and emerald necklace of imperial provenance was one of the sale’s top lots, selling for $3,012,000.;