







💎 Test Like a Pro, Shine Like a Boss
The Portable Electronic Diamond Tester Pen by JZK is a compact, lightweight device engineered to verify the authenticity of diamonds and multiple precious gemstones including sapphire, ruby, jade, agate, and crystal. Featuring a precise light and beep system, it delivers instant, reliable results with easy calibration and ergonomic design—perfect for professionals who need fast, accurate gemstone testing on the go.
| Brand | JZK |
| Model Number | 76166 |
| Package Dimensions | 31.8 x 23.6 x 3.1 cm; 117.93 g |
| Material | Plastic |
| Item Weight | 118 g |
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