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Summary If you have a diamond tester (a diamond-only tester) it will register 'diamond' on Moissanite (a manmade stone). Of course, the 'good' testers ("multi-testers") will test for both diamond and Moissanite - but if you only have a simple diamond-only tester, you will need a Moissanite tester to see if the stone might be Moisasnite. This tester cannot be used on its own, it is to check for Moissanite after it has tested as 'diamond' on a simple diamond-only tester. If you do not already have a diamond tester, do not buy this item. To see an article all about Moissanite and Moissanite-testing, click here. To see an article all about diamond testing click here. Accuracy / Guarantee A 'Moissanite' reading on this tester indicates that there's a high probability that the stone is Moissanite. It is not guaranteed. For instance, the slightest layer of grease on the stone (e.g. by touching it with your finger) will give incorrect results. The 1-year guarantee covers breakdown not accuracy. Details 7¼ X 1¼ X 1 inches. 180X30X25mm. Takes one 9v PP3 battery (supplied). Disclaimer All testers must be used in conjunction with the user's skill, knowledge and experience. Under no circumstances shall QUICKTEST be liable for direct or indirect loss sustained in connection with any item. Nothing is 100% accurate, you must understand the limitations of any tester you buy. We also suggest you regularly test known samples to check for any obvious faults. Full support given for items you buy from QUICKTEST. 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) ✔ ✔ 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' 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.
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