the knowledge.com ™ directory - business - consumer goods and services - jewelry

An independent, international, non-profit organisation dedicated to the identification, treatment, and origin. Services, education, and contact information. Located in Switzerland.

Provides technical and gemological appraisal and consulting services to the trade and the public. Services, articles, and links.

Technical advisers, appraisers, gemological training. Services, background, and contact information. Located in Brazil.

Independent service provides general information on gemstones, ongoing research and lab report services.

Fine jewelry appraisals by an independent team. Services, price list, and location map. In Manchester, CT.

Provides diamond grading services featuring grading of the diamond cut.

Offers gemstone analysis software, gemological education, and gemological laboratory services. Includes articles on diamond cut studies and a gallery of virtual diamond images.

Offers mini and full diamond grading reports and appraisals for the trade. Located in Bellevue, Washington

Provides diamond, colored stone and pearls certification, analysis and consultations for the jewelry trade. Produces educational and promotional materials.

Determination of the authenticity and country of origin of a rubies and sapphires. Offers gemstone reports and inscriptions.

Specializes in origin of color determination for fancy colored diamonds using Raman spectrometer. Offers diamond grading reports and appraisal services.

Provides grading and identification of diamonds, colored stones or pearls for the industry and consumers.

Offers gem grading and identification services and gemmological courses for the trade and members.

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