丹泉石包膜覆膜處理丹泉石包膜覆膜處理
GIA G & G Summer 2008:丹泉石包膜覆膜處理(COATING):電子電漿偶合質譜儀LA-ICP-MAS & 雷射繞射質譜儀ED-XRF可以偵測到包膜中的成份:鋅,錫,鉛等成份 Coated Tanzanite Shane F. McClure and Andy H. Shen
Examination of 23 tanzanites coated by an apparently new technique revealed that the smaller stones (...
丹泉石包膜覆膜處理
GIA G & G Summer 2008:丹泉石包膜覆膜處理(COATING):電子電漿偶合質譜儀LA-ICP-MAS & 雷射繞射質譜儀ED-XRF可以偵測到包膜中的成份:鋅,錫,鉛等成份 Coated Tanzanite Shane F. McClure and Andy H. Shen
Examination of 23 tanzanites coated by an apparently new technique revealed that the smaller stones (4–5 mm) could be identified as coated based on a combination of the unusually intense color and microscopic examination, which revealed surface iridesc⋯⋯ence as well as wear on facet junctions (small areas where the coating was abraded away). The two larger (3+ ct) stones did not show iridescence or wear, only small clues with high magnification, and therefore were much more difficult to identify. EDXRF and LA-ICP-MS analyses showed the presence of Co, Zn, Sn, and Pb in the coating
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