Gemstone Tester USB Rechargeable Portable Gem Checker Accurate Thermal Conductiv
Feature: \n 1. Fast and Accurate Verification: The high accuracy gemstone tester pen has advanced thermal conductivity, this tester accurately distinguish between real gemstones and other imitation gemstones.\n2. Application: Portable gem checker is suitable for handling any loose or mounted gemstones, as well as other jewelry and precious metal products, a convenient tool for anyone in need of quick and accurate gem testing.\n3. Easy Use: This gemstone detector comes with a prompt and sound. When the light is on, it can make a sound, making it easy for you to distinguish gemstone from stones.\n4. Notice: Gemstone tester works by measuring the thermal conductivity of an object. Make sure to test according to the correct testing procedure, avoid using the tester on unsuitable items (metal, skin, water and ect.), to ensure accurate testing results. Any improper operation may affect the accuracy of the test.\n5. Compact and Easy to Use: This small portable gemstone detector can fit in a:
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