RS Mizar offers reliable state-of-the-art gem testers that are simple and easy to use. Test mounted or unmounted stones. Nine volt battery and complete instructions included. Two year warranty.
Simple but precise, test diamonds in rapid succession.
Metal alert gives a long beep if metal is touched rather than stone.
Large/small switch for testing diamonds over and under eight points.
Seven second warm-up time with a 150 second shut-off alarm.
If the stone is a simulant nothing happens green light indicates diamond.
Low battery indicator; 9 volt battery included.