Jewelry & Natural Gemstones


Graduate Gemologist


Gemological Institute of America

Established in 1931, the Gemological Institute of America is the world’s foremost authority on diamonds, colored stones, and pearls. GIA exists to protect all purchasers of gemstones, by providing the education, laboratory services, research, and instruments needed to accurately and objectively determine gemstone quality.

GIA is where students from all over the world build successful careers in the gem and jewelry field. The Graduate Gemologist (G.G.) diploma, which focuses on gem grading and identification, is the industry’s highest professional credential.

Our Credentials

Sun Sun Jewelry's Pemika Vulink completed the following studies at GIA and is qualified as

  • Graduate Gemologist (G.G.)
  • Graduate Diamonds
  • Graduate Colored Stones
  • Accredited Jewelry Professional (A.J.P.)
  • GIA Continuing Education Recognition Program

You can verify Pemika's G.G. and A.J.P. credentials in the GIA on-line alumni directory, where she is one of 16 Graduate Gemologists listed in Singapore per July 1st, 2012.

For those interested in gemology, brief descriptions of the diploma programs are included below.



Graduate Gemologist (G.G)

Graduate Gemologists are able to identify hundreds of common and unusual gemstones and detect the latest treatments and synthetics.

They use time-honored identifying and grading techniques using a microscope, polariscope, spectroscope, and other professional gemological equipment.



Graduate Diamonds

The GIA Graduate Diamonds diploma program teaches to use the GIA International Diamond Grading System™ and the 4Cs directly from their creators.

  • Understand the 4Cs effect on diamond value
  • Grade diamonds in the D-Z color range
  • Detect synthetics, treatments, simulants and fracture-filled diamonds



Graduate Colored Stones

The GIA Graduate Colored Stones diploma program covers the origins of colored stones, how to identify them, and how to distinguish a synthetic stone from a natural. It also teaches how to detect treatments and apply GIA’s Colored Stone Grading System.

  • Relate quality, rarity, and color to value
  • Identify common and unusual gemstones
  • Determine external market factors’ effect on gem value



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