For slightly more than the cost of a test acid kit, the ET-18 precisely determines gold karat values equal to or greater than 10K, 14K, and 18K. Pocket sized and battery operated with a full one year warranty.

Find this tool at: http://www.jewelrytools.com/eurotool/jewelry-testing-supplies/RS-Mizar-ET-18-Gold-Tester.html

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