Reports and Services
Fees and Payments
How to Submit Stones
GIA is a leader in the identification and classification of natural and cultured pearls. Since 1949, the Institute has developed comprehensive standards for describing pearl quality known as GIA 7 Pearl Value Factors™ - Pearl Size, Shape, Colour, Nacre, Lustre, Surface, and Matching.
GIA’s Pearl Reports outline the specific attributes of pearls and pearl jewellery, including weight, measurements, growth environment (saltwater or freshwater), mollusc type and the presence of any detectable treatments.
Pearl Identification ReportThis report details the quantity, weight, size, shape, colour, origin (natural or cultured and type of nucleation), mollusc (if determinable), environment (saltwater or freshwater), and any detectable treatments. A digital image of the item submitted is also included on the report. This report may be issued on loose, mounted or strung natural or cultured pearls of any size, shape or colour.
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Fees for Service
Pearl Classification ReportThe classification report includes all of the Identification Report information as well as classifications for lustre, surface, nacre thickness and matching (if applicable). This report may be issued on loose, mounted or strung natural or cultured pearls of any size, shape or colour.
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Fees for Service
HOW GIA IDENTIFIES AND CLASSIFIES PEARLS
Inspection, Care, and Handling Procedures
GIA applies the same item identification and tracking procedures to all pearls, as it does for coloured stones and diamonds.
Weights and Measures
Pearls are counted by hand and then weighed with an electronic micro-balance that captures the weight in grams (mounted or strung), carats (loose), or carats and grains (loose natural).
Identification and Classification
Recorded weight and measurements are verified. Pearl types, molluscs and any detectable treatments are established using the state of the art testing equipment.
Colour and other factors are determined under a controlled viewing and lighting environment, using a comprehensive set of pearl masters to determine colour, and type-specific master sets of strands to classify lustre, surface and matching.
Report Processing and Item Return
All GIA Reports are examined and proofread to ensure high quality standards for the client. A final inspection and testing is then carried out to ensure that the same submitted item is returned to the client.
X-RAY COMPUTED MICROTOMOGRAPHY
Examination of the internal structure of loose pearls in cases where additional information to the standard real-time microradiography testing proves inconclusive.
Testing of a small sample of pearls from the same item. Only available for items with the same pearl type (for example, bead cultured). Also used for items that have too many pearls where testing all of them can be an issue.
NACRE THICKNESS COMMENT
Addition of a comment regarding nacre thickness shown in the comments section of the report. Only applicable for bead cultured pearls.
QUALITY ANALYSIS SERVICE
Sorting of pearls based on particular test categories requested by the client. Provided in list style with up to 10 pearls per report. Digital images are not provided with this service.
Suites can be tested and shown on one report. The fees will relate to the individual pieces in the suite.
If it has been a while since your pearl(s) were analyzed, submit the item and the original report. Your pearl(s) will undergo analysis and a new GIA report will be issued. Must be re-submitted within 12 months of the original report date.
Convert your current GIA report to a different report type. Submit the pearl(s) along with its original GIA report within 1 month of the original report date. The pearl(s) will be analyzed, and a new report will be issued. Applicable for certain types of pearl only.