Details

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 hard to measure on  electronic testers, you need to see exactly what reading your particular tester gives on each of:

Y.A.G
G.G.G
Synthetic sapphire
Synthetic spinel
Zircon
Strontium titanate
Cubic zirconia

...and then you can see how that reading matches your unknown stone 

Each stone rests in its clearly-labelled indentation, but the stones themselves are not labelled. If you drop them, you won't know which is which. We could work it out. But not easily. We might have to send some of them to a gemmologist. If you return these to us (whether because you've mixed them up, or simply because you have decided you don't like them) - there will be a £50.00 charge to sort them out.