QUICKTEST Diamond Tester
QUICKTEST Diamond Tester
QUICKTEST Diamond Tester
  • Load image into Gallery viewer, QUICKTEST Diamond Tester
  • Load image into Gallery viewer, QUICKTEST Diamond Tester
  • Load image into Gallery viewer, QUICKTEST Diamond Tester

QUICKTEST Diamond Tester


Ref: DT-5

Regular price
Sale price
Regular price
Out of stock
Unit price
inclusive of VAT. Shipping calculated at checkout.

Need help? Email us today

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


LEDs indicate diamond or not diamond; the diagram printed on the tester shows the actual size of diamonds as little circles so that you can easily see how to set the sensitivity - so much easier than showing it as a chart of numbers!

This is the only diamond tester (diamond-only tester) that will work in the cold (down to 5 degrees) and so is suitable for use at outside venues when it's cold - other testers give incorrect readings in the cold.

Can test small stones

Battery (supplied)

To see an article all about diamond testing click here.



LED display turns blue and bleeps on diamond.


Dimensions: 6¼"X1½"X¾" 155X38X20mm

Weight: 105g

Tip: can test stones down to 0.03ct (3pt) in size, smaller if you have good eyesight and a steady hand.

Operating temperature: recommended between 5 and 38 degrees C (41 to 100 degrees F). But tests show it still works at about 2 degrees C. (36 degrees F).


Power: one PP3 battery (supplied)

Warm-up time when switched on: 20 to 30 seconds

Warm-up time between tests: 1 to 2 seconds


Small, neat carrying case with stone holder slotted into a side pouch.

Battery included.

Guarantee / Reliability

Guarantee: one year

Returns rate (those that are returned to us during the guarantee period): less than 1%.



This really is the only tester that will work in the cold, so if you frequent outdoor fairs and markets in Northern Europe in the winter, this is the one to choose.

Easy-to-understand scale to show you how to set the sensitivity.


This is a diamond-only tester, it will not test Moissanite, that means that a Moissanite will show up as 'diamond' on this tester.


As a reliable diamond-only tester, the DT-5 beats the others hands-down. It's certainly not the cheapest on the market, but if you want the flexibility to test cold stones, and you want reliability, then this is the model I would recommend.


The most basic item of equipment for any jeweller (and especially for buying diamond jewellery) is a jewellers loupe. We recommend the 10X20, even a beginner will be able to see if a stone is scratched on top and chipped all around the edges (or the edges are worn smooth) or if it is full of bubbles - it will not be diamond, you will not need a diamond tester!