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Diamond Selector Jewelry Testing Tool Gemstone Tester Selector Testing, Adult Unisex, Size: 16 * 4 * 2.2cm (6.6 * 1.6 * 0.8in), Black

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Professional Diamond Selector II will show real diamonds or fakes,Use the big/small switch to test diamonds,Makes an audible sound to easily distinguish readings. Easy to use:Real diamonds make sounds and lights = 9. Fake crystal, such as cubic zirconia (CZ), crystal, glass will not emit sound and light 9.

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Size of Diamond Stone Testers: The gemstone tester pen diamond gold tester has size about 6.6 inches length and width about 1.6 inches with thickness

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