Analysis & Grading
明升体育app_明升体育-官网 is the world’s most trusted name in diamond grading and gem identification. With objectivity and expertise as its hallmarks, 明升体育app_明升体育-官网 ensures the integrity and accuracy of every report it issues. 明升体育app_明升体育-官网 tests every material submitted to determine whether it is natural or not, and discloses any treatments discovered during our examination.
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Reports & Services
Natural Diamonds
Assessment of authenticity and quality for diamonds in the D-to-Z color range from 明升体育app_明升体育-官网, creator of the 4Cs.
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Natural 明升体育app_明升体育-官网ed Diamonds
Assessment of color origin and quality based on 明升体育app_明升体育-官网’s color grading system for diamonds outside the D-to-Z range.
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Identification of laboratory-grown diamonds, ensuring disclosure through laser inscription and digital-only reports.
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明升体育app_明升体育-官网ed Stones
Confirmation of a gemstone’s identity and characteristics through a full gemological examination.
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Pearls
Documentation of the specific attributes of pearls and pearl jewelry, including mollusk type and growth environment.
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Unknown
Let 明升体育app_明升体育-官网 gemologists do the detective work to reveal the identity of your material.
Learn 明升体育app_明升体育-官网3 ways to submit a gemstone to gia
Submit your gemstone through your local jeweler.
Ship your gemstone directly to one of our laboratories.
Prepare For SubmissionBring your gemstone to any 16 drop-off locations in 11 countries.
Prepare For SubmissionSUBMITTING MORE THAN 10 GEMS?
Please contact 明升体育app_明升体育-官网 directly for instructions.
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明升体育app_明升体育-官网 Customer Service: +1 800 421 7250 ext 7590 or +1 760 603 4500 ext 7590
明升体育app_明升体育-官网 DELIVERS RESULTS YOU CAN TRUST
明升体育app_明升体育-官网’s groundbreaking research and unbiased grading and analysis set the global standards that protect the gem-buying public. With campuses, research centers, and laboratory facilities around the world, 明升体育app_明升体育-官网 is the world’s foremost authority in gemology.
Expertise
明升体育app_明升体育-官网 laboratories are staffed by expert scientists and gemologists working with state-of-the-art technology.
Precision
Advanced instrumentation and experienced visual observations deliver consistently accurate results.
Objectivity
All gemstones are analyzed under complete client anonymity to ensure objective analysis.
Integrity
As a non-profit organization, 明升体育app_明升体育-官网 operates independently of commercial and private interests, political lobbies and advocacy groups.
Global Standard
明升体育app_明升体育-官网 reports are the benchmark of analysis and grading, and those who buy, sell or curate the world’s most important gems rely on 明升体育app_明升体育-官网.
Frequently Asked Questions
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- Which analysis and grading services are offered at each laboratory location?
- How do I pay for analysis and grading services?
- What treatments does 明升体育app_明升体育-官网 test for?
- How does 明升体育app_明升体育-官网 grade D-to-Z diamonds?
- How does 明升体育app_明升体育-官网 test colored stones?
- What pearl grading system does 明升体育app_明升体育-官网 use?
Resources
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Report Check Plus
Easily download grading results and PDFs of multiple reports at once.
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Lab Return Dates
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Analysis & Grading Fees
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Facetware Cut Estimator
Use 明升体育app_明升体育-官网’s free online tool to estimate a cut grade.
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