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https://oureverydaylife.com/tell-coral-jewelry-real-14940.html
One way to test your coral item is to see how it reacts with acid. Pick a part of your coral jewelry that isn’t easily exposed (say the underside of a ring or inside of a bracelet) and swab it gently with lemon juice to see if tiny bubbles form on the coral’s surface.
https://www.wirejewelry.com/jewelry-making-blog/2434/testing-real-coral/
Jun 16, 2010 · Here are a couple of tests that you can do at home. Genuine coral is made of calcium carbonate, which will effervesce and dissolve in acid; so choose an inconspicuous part of the questionable coral and use a cotton swab with lemon juice to see if it causes that area to form tiny bubbles. (For those experienced, nitric acid can also be used.)
https://medium.com/@coralorgin/5-easy-test-to-identify-real-coral-gemstone-5093a617c6af
Dec 22, 2016 · · Magnification Test: Take a magnifying glass and put the Coral gemstone on white cloth under the appropriate lightening conditions. Now observe the Red coral through the glass and if …Author: Coral Gemstone
http://www.bjbead.com/coral/794.html
Coral jewelry was worn by kings or queen, but there are some pretty convincing fakes out from that time. So you will know how to test the real jewelry. We are discount jewelry exporter from China,we specialize in wholesale jewelry ,discount fashion jewelry,including cheap jewelry , handmade jewelry and other jewelry with necklace , bracelet ...
https://www.gemstoneuniverse.com/which-tests-to-identify-real-red-coral-from-fake-coral.php
Infrared Spectroscopy of Red Coral also referred to as Raman and Photoluminescence spectroscopy is the best, most accurate and 100% accurate test and method of determination of a real coral from fake coral and a natural coral to a treated coral. Raman Spectroscopy answers both the questions that chemical tests don’t without an iota of doubt.
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