Working towards a Procedural Standard in the Testing for both Stability and Assessment of the Impact on Health of Lead Glass-Treated Rubies and Beryllium-Treated Sapphires
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วันที่เผยแพร่ : 07/2021
สำนักพิมพ์ : The Gemmological Association of Hong Kong (GAHK)
หมวดหมู่ :
Geology & Gemology
จำนวนหน้า : 7
พร้อมใช้งาน :
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