Store Locator
Buy with Confidence
EXCLUSIVE 4C'S GUARANTEE
GCAL is the only Diamond Grading Lab in the world to guarantee its grading. You rely on the accuracy of a grading report to make your purchase decision. If that grading report has disclaimers disavowing responsibility or liability, what good is it? GCAL represents the highest level of integrity and ethics in the diamond industry. While others preach high ethics, GCAL remains the only lab to accept responsibility for its work.
SEEING IS BELIEVING
You won't find any generic, one-size-fits-all photos here. GCAL photographs every diamond numerous times. Each diamond's actual light performance is captured through the Diamond Profile® direct assessment light performance system so that you can see the scientifically measured beauty of your diamond.
THE FINGERPRINT FOR DIAMONDS
Gemprint® is the world's most sophisticated, non-invasive, positive identification technology that records the unique optical 'fingerprint' of each diamond. Just like a human fingerprint, every diamond has a unique Gemprint®. This patented and proven technology is the ultimate investment protection and affords your customers insurance discounts from the leading insurance companies.
INDEPENDENTLY CERTIFIED ANNUALLY
ISO 17025 Forensic Laboratory Accreditation is like a Good Housekeeping Seal of Approval for laboratories involved in testing or measuring materials. GCAL's methods and procedures are independently audited annually to ensure we uphold the ISO and RJC standards. GCAL is the only ISO 17025 accredited Forensic diamond lab in the world.