- East Asia Ltd
- Address:Room 1505 Hollywood Centre. 233 Hollywood Road
- Choi Wan Company Limited
- Address:Sheung Hei St.
- Alpha International Hongkong Limited
- Address:23 Austin Road
- KA FU COMPANY
- Address:RM. 1010, Block A, Merit Industrial Centre
- SunSong International Co.,Ltd.
- Address:7f, Rambler Garden
- Khushi Rough & Minerals Company
- Address:UNIT
- Jackwell Ltd
- Address:Room 3511, 35 / F Hong Kong Plaza, 188 Connaught Road West
- Seasons International Ltd.
- Address:Room A2, 3 / F, Lee On Iundistrial Building, No. 70 Hung To Road,
- InspireTechnology HK Co Ltd
- Address:22-Hoi Wing Road, Tuen Mun, NT
- Aplus gem co
- Address:62 Hoi Yeun Road, Camel Paint Building, Blk 2, 9 / F, Flat D18
- Quartz Sources - LANS Ltd
- Address:3 / F Jonsim Place 228 Queen Road East
- A.K.N. Company Limited
- Address:Room-D,11/F,8 Hart Avenue, Tsim Sha Tsui,Kowloon
- DongHai County ALFA quartz products co., LTD
- Address:
- Kam Shing Gems Co.
- Address:RM618, Hollywood Plaza, 610 Nathab Road, Mongkok
- Grand Fortune Trading Co
- Address:Rm 607, Yen Sheng Centre, Hoi Yuen Road, Kwun Tong
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