Phyhoo High Accuracy Jeweler Diamond Tester

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Regular price $13.99


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Do you like jewelry very much? But you are worried about how to identify the authenticity of jewelry.

Diamond Selector II diamond tester is an electronic instrument designed and manufactured according to the thermal conductivity of diamonds to identify the true and false diamonds. It can also be used for testing sapphire, ruby, crystal, agate and other stones.


  • Fast And Precise: This gemstone tester pen is designed to detect if a diamond or gemstone is real or fake, Diamond Selector II will indicate genuine diamond or fake in seconds.
  • Simple to Use: Diamond Tester Pen is simple to operate to get results. Real Diamond will emit sounds and lights >=9. It is designed for quick, precise, and safe diamond testing.
  • Portable: Portable electronic device for distinguishing real diamonds from other simulated stones. LCD displays & LED indicators. Uses switches for testing diamonds, Emits audible sounds to easily differentiate the readings.
  • NOTICE: * When testing, the probe needle and the tested object must be at a 90° angle. * When testing diamond, your right index finger must keep touching the metal panel on the back of the tester, while you do not touch the panel if you test other gemstones. * Do Not test any metal. * Don't wear gloves.

Operation Methods:

Step 1:Put the 9V battery in. (not included). Take off the probe cap.

Step 2: Turn on the switch, the power indicator is on.Wait few seconds for the probe to heat up until another indicator is lighting up.

Step 3: If you test diamond, you then need to turn on the number of lights corresponding to the indoor temperature and diamond weight.

Step 4: If you test other gems, you'd better calibrate the probe before testing, Method: by placing the probe vertically on a piece of glass, then adjusting the light to 5, and then placing the probe on the gemstone to test.

Test Result Analysis:

If lights >= 9 and have sounds, it is true diamond.

If lights < 9 and no sounds, it is not diamond.

If lights is 7 or 8, it is true crystal.

If lights is 6 or 7, it is true jade.

If lights is 4 or 5, it is glass.

Don't test metal,Don't wear gloves.


  • Color: Black

  • Power supply: 1 * DC006P 9V Battery(not included)

  • Item size: 16 * 4 * 2cm (6.6 * 1.6 * 0.8in)

  • Item weight: 62g / 2.2oz

  • Package size: 18.5 * 5.6 * 3.5cm (7.3 * 2.2 * 1.4in)

  • Package weight: 157g / 5.5oz

Package including(9V battery not included):

  • 1 * Diamond Selector II

  • 1 * Carrying Case

  • 1 * User Manual


Your order of 100$ or more gets free standard delivery.

  • Standard delivered 7-21 Business Days
  • Express delivered 3-12 Business Days

Orders are processed and delivered Monday-Friday (excluding public holidays)


30 Days Free eturns.

Phyhoo High Accuracy Jeweler Diamond Tester

Regular price $13.99