Ari synthetic-diamond tester by Presidium Magnification_Multi magnification * useable diameter of this

* useable diameter of this lens (allowing for the rim that holds the lens in place) 11mm

round) and perfectly-cut in proportion

carat (ct)

Although our survey (see comments from customers below) indicates that a pen-probe should last between 3 and 18 months

jpg images stored on the card

Ari synthetic-diamond tester by Presidium Magnification_Multi magnification * useable diameter of thisSummary The Presidium ARI 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 (= lab grown). That means you must first test the stone on a good quality diamond tester first this is not included. If you are not an experienced jeweller or professional diamond dealer: check with a simple (but good quality) diamond tester to make sure you have a