Our "14-day returns” policy is extended over Christmas. Orders placed between 4 and 19 December can be returned (if not suitable) up to 5 January. Excludes consumables.

Set of sample diamond simulants

Set of sample diamond simulants

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


This is a set of 'difficult' stones that are confused with diamond, not so much because they look like diamond to a jewellery expert, but because they are very hard to measure on machines: YAG, GGG, synthetic sapphire, synthetic spinel, zircon, strontium titanate and cubic zirconia.

Diamond testers are good at distinguishing diamond from non-diamond; gem testers are good at categorising gemstones that are obviously nothing like diamond; the difficulty is  knowing when you might have one of the above, which are similar to diamond - the only way to know exactly is, on a tester, to compare the readings of actual stones.

They are clearly labelled, do not mix them up, they cannot be returned!


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  • What mm size are the stones please?