The Gemmological Association of Hong Kong Limited 香港寶石學協會有限公司 P.O. Box 97711, T.S.T., Kowloon, Hong Kong Website: www.gahk.org Email : Tel: Fax:

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Date: 2015-03-25 07:29:34 Gemology Gemstones Mineralogy		The Gemmological Association of Hong Kong Limited 香港寶石學協會有限公司 P.O. Box 97711, T.S.T., Kowloon, Hong Kong Website: www.gahk.org Email : Tel: Fax: Add to Reading List Source URL: www.gahk.org Download Document from Source Website File Size: 333,43 KB Share Document on Facebook