Diamond Experior Refill acid bottles for precious metal testing making tiny magnifiers look like

making tiny magnifiers look like serious bench magnifiers

8X magnification will give you a lens of 15 to 25mm in diameter and a working distance of about 25mm (1 inch)

Not sure what type of tester to get

) for examining stamps

Diamond Experior Refill acid bottles for precious metal testing making tiny magnifiers look likeSummary Very reliable make, GemTrue. This is the latest model following on from their Diamond Plus. Automatic display, no need to adjust the sensitivity according to the size of the stone and the temperature, three lights: Diamond (= diamond or Moissanite*) or Other (= not diamond), or Metal (= you've missed the stones and have touched the setting by accident). To see an article all about diamond testing click here. Technical DISPLAY Three lights,