Types
Gain in-depth knowledge of the stunning variety of colored stones in the modern world.
Read MoreView a detailed chart comparing the features of the Colored Stone Identification Report and the Colored Stone Identification & Origin Report.
Read More
The first installment of this column discusses the formation of colored stones from the crust-mantle transition and below.
Read MoreGIA receives a varied and complex range of items for identification; everything from colored stones and pearls, unusual carvings and jewelry, to the latest in synthetics, and simulants, as well as treated gems.
Read More
Abstracts of speaker presentations from the “Colored Stones and Pearls” session of GIA’s 2018 International Gemological Symposium.
Read More
Poster abstracts on “Colored Stones and Pearls” from GIA’s 2018 International Gemological Symposium.
Read MoreIn addition to grading and identification, we offer a selection of other services for colored stones.
Read More
