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Gemstone Korea Co.,Ltd
#202,327,Teheran-ro,Gangnam-gu,Seoul,Republic of Korea (ZIP code) 06150
Tel: +82-2-557-0010
Gemstone (HK) Co,,Ltd
Flat/Rm 1810 18F. Ceo tower 77 Wing Hong Street Cheung Sha Wan HK
Tel: +852-2370-2658
Gemstone (SH) Co,,Ltd
11F, Building 10, Lane 2777, Jinxiu East Road, Pudong New Area, Shanghai (ZIP Code) 201206
Tel: +86-21-3188-5088
Gemstone (SZ) Co., Ltd
#2501, Building A, Dachong Business Center, Nanshan District, Shenzhen, Guangdong, China (ZIP Code) 518053
Tel: (Direct) +86-755-8860-1162