Tourmaline and gemstone identification methods, how to distinguish

1. The difference between tourmaline and similar gems. And red tourmaline gemstones like ruby, red spinel, spodumene, pink topaz, red beryl, lavender crystal etc. and green tourmaline similar gems are diopside , emerald, green, blue beryl and tourmaline blue spinel stones like tourmaline and their differences are: tourmaline edges at the obvious double shadow, fluid inclusions and fractures are more strong dichroism , transparency, and its density and refractive index rates are quite different, large birefringence evaluation and purchase 2. tourmaline tourmaline with color, transparency and internal defects and how much weight as the basis for evaluation and purchase. Optional Note: better transparency tourmaline, shiny glass surface, uneven same crystal color, internal defects (inclusions and fractures) tourmaline less brittle, should be worn to avoid collision Shanghai Bao Arts Exhibition Services Ltd. (Hong Kong Po. Arts International Auction Co., Ltd.) is a strength in Shanghai, a large auction company, Shanghai Bao Arts International Exhibition Service Co., Ltd. for the new and old customers will strive to run each of the auctions to return the old and new customers to provide them with a collectible collection . Select Shanghai Bao Arts Exhibition Services Ltd. of the three major reasons: 1: The company is located in Shanghai metropolis global economy will be one of the world's collectors settlements. Shanghai several major Antique emerged thus promoting the collection. Christie's company, Zhang Sotheby's example, the Board of Directors collectors target look around the world, the goal to build the country's top auction houses. 2: The company currently antiques broker commissions and professional expert for several digit to check collections, the company has its own international exhibition company, formed exhibition auction sales of train services, is committed to the pursuit of high turnover, all collections will show the whole network, for Big collectors at home and abroad. We aim to achieve expertise to perfect, perfect marketing system, experts perfect. Certified companies, auctions, exhibitions, exchanges, sales of high-quality, professional and convenient art trading platform 3: The company mainly composed of groups of buyers: the headquarters of the Group of Hong Kong buyers, domestic and foreign antiques association organizational structure, investment antique lovers Shanxi rich, Jiangsu, Zhejiang and real estate owners, private museums, private collections organizational unit Hong Kong, Macao and Taiwan, high porcelain research enthusiasts, lovers of high jade research, jade carving masters, folk private enthusiasts and so on. Micro letter: 15000671921 QQ: 158963923 E-mail: 158963923@qq.com holding collection range: Chinese Ceramics: ancient ceramics boutique in the Yuan, Ming and Qing mainly porcelain better! Jade Jade: Ming jade, high jade, jade modern times require good quality jade, carving clever, skin color is good! Chinese painting and calligraphy: ancient famous artists and celebrities painting fine, fine paintings and contemporary celebrities Lingnan Painting and Calligraphy! Miscellaneous Gifts: ancient paper stationery, purple, stamps, bamboo, horn carving, stone and so on! Call the person in charge: Chen Xuan Manager Address: Xuhui District, No. 425 Yishan Road, Building 23 F KPS Contact Phone: 15000671921