Hmkis Diamond Tester Pen Review - Is It Worth the Hype?

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Do cheap diamond testers work? - Quora

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Easily Operated: If the lights move rapidly lighting up as they go, and there is a steady beep, and the lights are greater than or equal to 9. You know you have a real diamond. There would be no beep sounds and the diamond tester will not light up from green to red for cubic zirconium, crystal, and glass, and lights are less than 9 Fast Results: Designed for rapid, accurate, and safe diamond testing. Through non-destructive testing, the operation is simple and precise.

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★The kithing diamond Tester Pen is simple to operate to get results. Real Diamond will emit sounds and lights >=9. It is designed for quick, precise,

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