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https://www.totaram.com/education/cat/gold-jewelry/post/gold-purity-testing/
The method known as 'fire assay' is the oldest known method of testing gold and continues to be one of the most accurate. When gold is melted, a sample of the gold is taken, either by drilling through the …
iGem Instruments - the best in electronic jewelry testing, electronic gold testers, diamond testers, gemstone testers. Best brands, including Tri Electronics.
https://www.amazon.com/Appraisal-Jewelry-Organizer-Diamond-Testing/dp/B0068T50HU
Quality equipment for those interested in fine or scrap jewelry, appraisal, buying/selling, and other professions & hobbies related to precious stones & metals. The electronic DIAMOND TESTER …4.3/5(26)
https://www.wikihow.com/Test-Platinum
Aug 08, 2019 · A jeweler can test to see if a piece of metal is platinum and what percentage it is with more involved tests. Thanks! Helpful 0 Not Helpful 0. Advertisement. Support wikiHow's Educational …75%(8)
https://www.gia.edu/bench-tip-use-the-touchstone-method-for-testing-purity-karat-gold
A simpler method for determining gold purity in jewelry is the “touchstone” testing process, an age-old technique that is relatively nondestructive to jewelry and offers quick results. Use with care: Touchstone testing …
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