Handheld presidium gem tester +3x AAA batt (model PGI) Discounts apply there is no choice

there is no choice

especially if the stone doesn't have a strong colour

UV Security marking)

care must be taken when observing the results - which is why I say

Handheld presidium gem tester +3x AAA batt (model PGI) Discounts apply there is no choiceSummary Handheld model. The first gem tester that is truly pocket size, with the finest probe tip, will test stones down to 2pts in size. Works on any stone, loose or mounted, even uncut. Instruction manual (pdf) Video (youtube) Video Details replaceable probe (i. e. if you break it) latest technology, this is the only tester of this sophistication that is pen size, operated with one hand, slips into a pouch, truly pocket size super fast warm up time