Pearl

GIA Pearls

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 Report

    This 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.

    View Sample Report
    Fees for Service
  • Pearl Classification Report

    The 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.

    View Sample Report
    Fees for Service

HOW GIA IDENTIFIES AND CLASSIFIES PEARLS

Pearl Weight and Measure Machine

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.

Pearl Inspection & Testing 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.


RANDOM SAMPLE

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

Suites can be tested and shown on one report. The fees will relate to the individual pieces in the suite.


RE-IDENTIFICATION

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.


REPORT CONVERSION

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.

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How GIA Identifies and Classifies PearlsGIA Pearls

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 Pearls

Pearl Report

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 Report

This 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.

 

 

Pearl Classification ReportPearl Weight and Measure Machine

The 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.

 

 

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

Pearl Inspection & TestingRecorded 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.