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Gemmological

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Diamond Tester World the smallest diamond tester! Features:  No need to adjust anything, only switch on and then test the stone.  With ultraviolet light to test fluorescent reaction of stones.  Most compact in size with deluxe packing.  One year manufacturer's warranty. Specification: •  Type:Gemstar brand Diamond Sure I model diamond tester. •  Working voltage:DC 9V, 6F22 battery •  Probe warm up time: about 25 seconds. •  Working time: about 5 hours for continuous use. •  Working temperature: 18C to 30C. •  Size: 1560mm × 31.5mm × 21mm(L × W × D). •  Weight 48g (not including battery).