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Photo 1 of (see all images) Diamond Tester Professional Pen Tool - KETAR Diamond Rings Jewelry Testing Kit Black Diamond Jewelry Tools Fake Diamonds Gem Tester - Photo 2 of (see all images) Diamond Tester Professional Pen Tool - KETAR Diamond Rings Jewelry Testing Kit Black Diamond Jewelry Tools Fake Diamonds Gem Tester - Photo 3 of (see all images) Diamond Tester Professional Pen Tool - KETAR Diamond Rings Jewelry Testing Kit Black Diamond Jewelry Tools Fake Diamonds Gem Tester -