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Most stones are testedPresidium® Gem Tester II. Consistent with age and usage. when possible. Where the jewelry settings allow diamonds and diamond simulants are tested using a Gemoro Testerossa testing wand.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.