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Pickup available from Quicktest (WD18 8PH)
Email us or call on 01923-220206 for appointment.


This is not a diamond tester!  You must start by being certain that you are testing a diamond.

This tester distinguishes natural diamond from synthetic diamond (and it also tests for Moissanite). 

Natural diamonds (the 'rough' square crystals) grow deep in the earth over a period of 2 to 3 billion years. 

Synthetic diamonds are grown in a laboratory by man over a period of a few weeks - they are also know as manmade diamonds or laboratory-grown diamonds. 

Synthetics diamonds and natural diamonds are 'the same', both physically and optically.  It is this being 'the same' that makes distinguishing them so difficult, and that is why the testers are so expensive.

Do not confuse synthetic / manmade / laboratory-grown  (all 'real' diamonds) with  imitation / simulant.  Moissanite, cubic zirconia, white sapphire, glass etc are used instead of diamond, but they are not diamond, they are imitation / simulant.   


This is my favourite synthetic-diamond tester. 

  • comfortably handheld (most of these testers are either bench models or are "just about" small enough to hold in the hand)
  • can test any stone mounted in jewellery (most of these testers are either for loose stones only, or can only test stones in small rings with open settings)
  • also tests for Moissanite (this is essential if you don't already have an expensive muti-tester diamond tester)
  • fastest response time (test-result in 3 seconds)
  • left-handed or right-handed use
  • one year guarantee

See our guide to testing synthetic diamonds.


Turn it on, wait 10 seconds for it to warm up, place the probe in the centre of the stone as instructed on the display, the display then indicates one of the following:

CVD / HPHT / Type IIa
CVD/ HPHT are two are methods of growing diamond = synthetic
the last is a rare type of natural diamond that will show up as 'synthetic' on a tester

By "diamond" they mean natural diamond

Moissasnite is not diamond (neither natural diamond nor synthetic diamond), but it is useful to be able to detect these because they show up a diamond on cheap diamond testers. 

You notice that there is no reading not diamond; if you are not a diamond dealer or experienced jeweller you must test the stone on a diamond tester first. Testing non-diamonds on a Synthetic Diamond Tester can give incorrect readings.


Size 190mm X 46mm (1.2 inches) X 25mm 

Weight 60g 

Tests stones from 0.02 to 10 carats incl. mounted stones in any setting

Tests stones of colour D to J

Tests round (brilliant-cut) stones that are perfectly polished


Start-up time 10 seconds

Testing time 3 seconds


Power: three AAA batteries (supplied) or any USB power source (USB cable supplied)

Battery life: 4 hours of testing

Auto-power-off yes, if used on battery power it turns itself off after 10mns with no activity.


Neat heavy-duty carrying pouch

USB power cable (for use instead of batteries)


Accuracy gives correct results about 95% of the time (6% false positive rate, 4.5% false negative rate).

Developed a fault in the guarantee period (1 year): new item, not enough sold to know.


    All equipment and materials must be used in conjunction with the user's skill, knowledge and experience. Under no circumstances shall QUICKTEST be liable for direct or indirect loss sustained in connection with any item. It is your responsibility to regularly check equipment against known samples, to ensure that it is working correctly.




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