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Best Choice QUMOX 
QUMOX Diamond Tester II V2 with 60X LED Loupe – Portable Electronic Gemstone Selector Tool for Diamond, Moissanite & Gem Accurate Diamond Identification - Detects real diamonds based on thermal conductivity — instantly distinguishes diamondsValkynos 
Valkynos Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor – Fast 0.5s Detection, Portable Gem Checke After-Sales Service: 30-day unconditional return or exchange. For any issues or battery replacement (same type available
New V2 Diamond Tester Selector (GS16) Gemstone Tool Gem Jewelry Test Tool LED Diamond Selector II" is a portable electronic device for distinguishing real diamonds from other simulated stones. 1 x DYotsuba 
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HMOIS High Accuracy Diamond and Gemstone Detector - Portable Tester Pen With LED for Moissanite (Black) Best Value Hqdz 
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