Jewelry Development

Jewelry manufacturing services are conducted as partnership between American Gemstone Authority, LLC (AGA) and Manja Thai Co., LTD. Sales, support, and customer interface is conducted by AGA

QUADRATURE

Service provided by:
Manja-Thai Co., Ltd. in Bangkok, Thailand.

Composition and History

Quadrature is a partnership of four primary constituents, representing three different companies, four countries, and the main specialties in the gem and jewelry industry. It is the elimination of intermediaries, access to a small group of qualified people, and all of this in the gemstone trading capital of the world, where labor is talented and inexpensive. It is this formula that enables us to carry out our customers' creations with high quality standards at prices completely incomparable to those of western production facilities.

The Director:

Yannick Mandaba (profile)
Design and QC, Gemstones buyer.
( Imagiative French Gemologist: "It's all about general proportions and small details" )

It is precisely where our structure can save our customers a lot of time and travel between cutters jewelry factories. Mr Mandaba is here to ensure that the cutting is well done and that the stones are always of the best possible quality.
Precious and Fine Stones used in medium to high quality jewelry for Boutique stores and brands are cut to fit with the settings that are produces in large quantities.
Finding center stones, such as Sapphire, Ruby, Tourmaline, Spinel, Chrysoberyl, Natural Zircon, Tsavorite or Tanzanite.
Buying diamonds for pavé settings.

Before the gemstone comes the design, which must comply with the reality of the market.
-The role of the Director of the Design Section is to setup the requirements, interpret the 2D design/picture/sketch, and work with the wax modeler or the Computer 3D CAD designer in order to obtain real object with nice proportions.
-The Diector of Design is also head of the QC Section since he knows best what it is supposed to look like, and all the detailed requirements. Every important step of the production is submitted to QC.


THE MASTER CUTTER:
(Rough Buyer, Independant Workshop, developer of Machines for Lapidary, business partner)

Our master cutter has over 20 years of experience in gemstone cutting and rough buying, the majority of which were spent cutting on location for gemstone mines in a very important producing country for semi-precious and precious stones. As a country rich in many different types of minerals, its mines are quite varied producing many different types of gemstones all of which must be faceted differently. That is why a brasilian cutter is very versatile and skilled in gemstones cutting.

It is through the extraordinary aid of this man that we are able offer extremely precise cutting services, as well as extremely competitively priced rough and faceted gemstones.