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Jewerly Manufacturing in Thailand

Manufacturing solutions for gold and silver jewelry manufacturing in Thailand. We are your resident partners for complete control of the production chain; from rough gemstones in our cutting workshop to the finished piece of jewelry at the factory, according to your jewelry design or detailed project.





The program "Quadrature" is a partnership between the 2 following companies:
  • Manja Thai Co., Ltd. is the base for production in Thailand,

  • AGA, LLC, is exclusive agent for administration and distribution of collaborative products.


American Gemstone Authority, LLC
Gemstones & jewelry
Equipments & technologies
PO Box 300, Hanover
NH 03755, USA
Tel: +1 (603) 653 8121 (Fr-Eng)
Tel: +1 (617) 314 6225 (English)

Manja Thai Co., Ltd
Thai-French Exporter of
Gemstones, Jewelry & Equipments
58 Thonglo soi 25, Sukumvit 55 Rd,
Klongton Nue, Wattana,
Bangkok 10110, Thailand
Cel: +66.8782.00.622:
Tel/Fax:+66.2617.3899