Professional Diamond Tester, for Jewelry Jade Ruby Stone Testing

Offers a highly compact design that is perfect to have on you when shopping for jewelry, buying/trading diamonds, sorting through scrap jewelry, bidding at estate sales, auctions and more. Professional Diamond Selector designed for quick, precise, and safe diamond testing.Designed with a clear screen, so you can get the useful data quickly; The item you are testing will be a true diamond when the data is above 9, and a true emerald crystal agate when the data is 7, saving your time to recognize.Diamond Tester Pen is simple to operate to get results. 1. Put the battery in the tester. 2. Take off the probe cap. 3. Turn on the switch. 4. Make sure only one light lights up on the scale. 5. Make sure the ready lamp light is on. 6. The probe needs to be vertical to the diamonds.This jewelry diamond tester has a wide range of uses, not only for testing diamonds, but also for industry, circuit boards and printing, gardening, identification, education, geography, homes and office.Precision electronic instrument, the use environment is 5-35 degrees Celsius, and the relative humidity of the air is 80%. The gems to be tested must be clean, dry, and at room temperature.Colour: blackMaterial: metalPackage Contents:1 set * Diamond testerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.