Diamond/moissanite dual tester Distinguish diamond, Moissanite and CZ quickly Diamond/Moissanite Dual Tester DMT-1Distinguish diamond, Moissanite and CZ quickly. Simple on-off switch, no tricky adjustments. Three minute shut-off alert to save battery.Power supply: 9V battery. DMT-1 Diamond / Moissanite Dual Tester