Diamond Experior

Summary 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, diamond, other or metal (see SUMMARY). PHYSICAL Dimensions: 6¼"X1½"X¾" 155X38X20mm Weight: 80g Tip: can test stones down to 0.03ct (3pt) in size, smaller if you have good eyesight and a steady hand. Operating temperature: recommended between 5 and 38 degrees C (41 to 100 degrees F).  POWER Power: one PP3 battery (supplied) Warm-up time when switched on: about 20 seconds Response time (to give a reading) about 1 second Warm-up time between tests about 1 second. ACCESSORIES / PRESENTATION Small, neat carrying case with stone holder slotted into a side pouch. Battery included. GUARANTEE 1 year. Limitations This is a diamond-only tester, it will not test Moissanite, that means Moissanite will register 'diamond' (for other models see the ALTERNATIVES tab).  A UV light serves no purpose when testing diamonds v. non-diamonds (though it does help with testing diamond v. Moissanite in the multi-testers).  Alternatives Please note, none of these testers will distinguish natural stones from synthetic stones. "Synthetic" is a scientific term meaning 'made by man in a factory/laboratory to the same formula found in nature'. The two are usually indistinguishable, synthetic diamond is diamond (read about synthetic diamond testers and see our ARI and ARETE models). The testers below are to distinguish diamond from non-diamond (simulant/imitation).    Model Tests mounted stones [1] Tests  Diamond Tests  Moissanite Tests Ruby /  Sapphire Other stones Diamond selector II, (DT-DS-crp) (works some of the time) ...discontinued ✔ ✔ Shows up as diamond ✘ No reaction on non-diamond Diamond selector II  (DT-DS) (cheap but works most of the time) ✔ ✔ Shows up as diamond ✘   No reaction on non-diamond Diamond Experior (best diamond-only tester) ✔ ✔ Shows up as diamond ✘ Non-diamond reads 'Other Stone' Moissanite tester by GemVue (Moissanite Plus) MOISS-4) ✔ ✘ ✔ ✘ You must only test stones you are certain are diamond Multi tester. Experior by Gemtrue (MULTI-EXP) ✔ ✔ ✔ ✔   No reaction on other stones SAM multi-tester (MULTI-SAM) ✔ ✔ ✔ ✔ Non-diamond reads ‘simulant’ Handheld presidium gem tester (GEMTEST-PGI) ✔ ✔ Shows up as diamond ✔ 31 stones Standard Presidium (GEMTEST-P2) ✔ ✔ Shows up as diamond ✔ 17 stones Presidium Duo gem tester (GEMTEST-DUO-II) [2] ✔ ✔ ✔ [3] Digital refractometer by Presidium (REFRACT-DIGI-PRESID) ✘ ✔ ✔ ✔ 55 stones Refractometer (optical not electronic) (Refract-L) ✘ ✘ ✘ ✔ Hundreds of stones [4] [1] All testers test loose stones but not all can test mounted (set in jewellery) stones. [2] The probe / analogue meter will test mounted stones, the digital meter will only test loose stones. [3] The probe / analogue meter: 17 stones; the digital meter: 40 stones. [4] Skill and practice is required to use an optical refractometer, instructions are not included, see any textbook about gemmology…or the internet.