A&A Jewelry Supply - Tri-Electronic GT-4000 Gold Tester

lt;p>The essential tool that goes to high range. Tests gold alloys from 6 to 24 karats in all four colors. Also detects platinum. The unit tests from 6 to 18 karats and 24 karat. Also has a reading range for 20-22 karats. No dangerous acids or harmful chemicals. Ecologically safe and provides a numeric reading on the LCD display that corresponds to the karat table. Manufacturer

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