Multicolor Gems Ltd is a major importer of rough stones from East Africa and Madagascar. Registered in Thailand, Multicolour Gems Ltd is a joint venture between Swiss, American, Thai, Dutch, and Australian shareholders. Multicolour Gems, one of the online leaders in the precious and semiprecious gemstone category and can be found on the web at www.multicolour.com.
1. Industrial ultra-hard material
- Industrial Diamond Association of America
The oldest and most prestigious association in the superabrasive and ultra-hard materials industry
- De Beers Industrial Diamonds (Element Six )
Element Six or the De Beers Industrial Diamonds group of companies is the world´s leading supplier of high quality superabrasives and industrial diamond materials, including both diamond and the complementary superabrasive cubic boron nitride (cBN).
2. Industry standards and safety
- American National Standards Institute
The American National Standards Institute (ANSI) is a private, non-profit organization (501(c)3) that administers and coordinates the U.S. voluntary standardization and conformity assessment system.
- Crystalline silica hazards
This OSHA site includes current information on the issue of crystalline silica hazards that will assist businesses and workers in identifying potential silica hazards in their workplaces.
- CSA International
Independent, not-for-profit organization for the development and application of standards.
- Gemological Institute of America
Established in 1931, GIA is the world´s foremost nonprofit institute of gemological research and standards.
- Underwriters Laboratories Inc.
Independent, not-for-profit product safety testing and certification organization.
3. Professional Societies, Organizations and Labs
4. Gemstone dealers directory
- China Stone Ltd
Providing precious and semi-precious loose machine-cut gemstones in calibrated and free form sizes faceted using advanced fully automated cutting technology.
Online catalog offers cut Zircon, Tourmaline, Spinel, Peridot
and other gemstones at fair prices. Also large selection of Emeralds.
Provides an exellent collection of color faceted gemstones selected and graded according to high standards of quality and value.
- Multicolor Gems Ltd
The biggest online selection of the gemstones and probably largest supplier of color gemstones from Africa.
- Opal Directory and Portal
Opal Portal and Opal Directory featuring a knowledge center as well as links to the best places to buy opal, opal jewelry and related material.
- Australian Opal and Opal Jewelry
Australian opals and black opal jewelry including opal rings and opal pendants. Also stock cut, rough, fossil and opal parcels. secure shopping and worldwide shipping.
5. Gemstone jewelery directory
- Walsh Brothers birthstone jewellery
High street jewellery shop with a wide range and international delivery.
- The Ganoksin Project
The gem and jewelry world´s foremost information resource on the Internet. Open to the public, Free of charge - a substantial library of articles, publications, reports, and technical data on gem and jewelry related topics; as well as a sizable collection of art and jewelry galleries, for both the casual visitor and the professional.
6. Diamond information resources and diamond dealers