Graduate Coloured Stones Program

The GIA Graduate Coloured Stones Diploma Program explores the identification of common and unusual gemstones found in the marketplace. Subjects covered include the GIA Coloured Stone Grading System and the correct usage of standard gemmological equipment to distinguish natural, treated and laboratory-grown gemstones. The programme also examines which gems are commercially important, shifting supply patterns, and how these factors affect gem prices and availability. This programme also includes the study of more than 60 species of gemstones, and how illumination techniques can facilitate the identification process.

What Will You Learn

Building a knowledge base about coloured stones and the coloured stone market
Using gemmological equipment effectively to identify gemstones
Explaining the GIA Colored Stone Grading System and evaluating gemstone quality
Recognising how quality, rarity and colour affect value
Determining how market factors affect gem value

Possible Career Paths

Appraiser

Coloured Stone Manufacturer

jewellery Manufacturer

Loose Coloured Stone Buyer and Seller

Jewellery Retailer and Wholesaler

Lab and Research Professional

Topics Covered

Colored Stones & Colored Stone Grading

Learn the characteristics of colored stones, with a focus on ruby, sapphire, and emerald.

Gem Identification

Identify more than 60 species of gemstones, distinguish naturally from laboratory-grown gems, and detect gem treatments.

Equipment & Instrumentation

Learn diamond identification and grading skills GIA graders use.

Treatments, Laboratory-Grown & Imitations

Identify gemstones that have been laboratory-grown, treated or are imitations.

Markets & Supply Chains

Understand how market factors and the supply chain affect value.

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About GIA

Established in 1931, GIA protects the public through gemmological research, education, impartial gem identification and grading services, and instrument development. The world’s foremost authority in gemmology and creator of the 4Cs, GIA sets the standard for determining the quality of diamonds and performs research-based identification of coloured gems and pearls. All of GIA's activities are governed by its mission to serve the public.