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you can then weigh piles of items
55mm lens diameter
5% false negative rate) providing the colour is 'clear' (colour D to J) and the size is at least 0
"a bit fiddly"
For the gemmologist the refractometer is the most important gem tester after a loupe
Tool set, small, for watches and straps Electronic Gem Testers you can then weigh pilesDetails Contents: 3 pronged screw back opener with 3 sets of fittings 'Gun' type rivet remover with two sizes of pusher Watch knife for snap backs Watch bar remover (fork end + push end) Tweezers Two flat head screwdrivers Folding pocket magnifier
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