GAHKGustav Adolph Hagemanns Kollegium (Dutch: Gustav Adolph Hagemanns College)
GAHKGemmological Association of Hong Kong (est. 1979)
References in periodicals archive ?
Dates Topic(s) 20 Jun "Jewellery domestic sale policy for Guangzhou, China" organised by Bureau of Foreign Trade and Economic Cooperation of Guangzhou Municipality 21 Jun "Microworld of Jade" organised by GIA 21 Jun "Jewellery Appraisal in the Antique Market -- a Brief Evaluation Criteria of Antique Jewellery" and "Ruby & Sapphire -- Buying Tips" organised by GAHK Pearl Auctions -- rendezvous for quality pearls