Arete synthetic-diamond tester by Gemtrue, 'Duo' model, includes a Diamond Experior tester Options_Mains Optional this item is not supplied

this item is not supplied with instructions

see What he various testing kits do and Testing white metals

from leaves and insects to stamps and fabrics

Can test any stone mounted in jewellery and it also comes with a stone-holder for testing loose stones

See information about (and reviews of) binocular (head-worn) magnifiers- especially the surgeons-type

Arete synthetic-diamond tester by Gemtrue, 'Duo' model, includes a Diamond Experior tester Options_Mains Optional this item is not suppliedSummary Arete synthetic diamond tester plus a free Diamond Experior thermal diamond tester. Between them, they test for natural diamond, synthetic (= lab grown) diamond, Moissanite, and "any other stone". The GemTrue Arete is an essential tool for the experienced jeweller and professional diamond dealer, it is for testing known diamonds, to see if they are natural or synthetic. That means you must first test the stone on a good quality diamond tester