High Accuracy Diamond Tester Professional Jeweler For Novice and Expert - Diamond Selector II 9V Battery Included

Product Information

In addition, there is no machine that will distinguish natural gemstones (grown in the ground by nature) from synthetic stones (grown in a laboratory using the same chemicals and the same conditions found in nature). "Synthetic" is not to be confused with "imitation" (or "simulant") where one stone 'imitates' another, e.g. blue spinel might look like sapphire, but it isn't - it's spinel; Moissanite might look like diamond, but it isn't - it's Moissanite. Anything electrically conductive reads MOISSANITE - it's probably Moissanite, it could be another electrically conductive gemstone. All the rules about electrical conductivity, listed above, apply. EXCEPTIONS Choose a diamond tester that signals if you accidentally touch part of the metal setting instead of the stone. A common error is testing the metal instead of the stone and getting a false negative. If your tester doesn’t recognize metal, it can indicate that you are holding a real diamond when you unknowingly touch the setting, even if the diamond itself is fake.

BUT - it's purpose is to tell you if you have a diamond or not, not to tell you if you have a sapphire/ruby, Moissanite, paste etc. Get a friend or colleague to use the tester. Get two or three friends or colleagues to use the tester. As each one does this, either leave the room or keep your mouth firmly shut, don't give them any clues, let them work it out for themselves. Very often if it works when they use it, see what it is that they are doing different.The Presidium ARI will distinguish most synthetic diamond from natural diamonds. It will also detect Moissanite. The Presidium ARI is not a diamond tester for distinguishing diamond from non-diamond, if you need a 'diamond tester, you can find the product here, or see our general guide to buying diamond testers. Wait for the READY light to come on between tests, make sure your finger(s) are touching the metal plate(s) on the tester, make sure you can clearly see the tip and the centre of the stone, even if this means finding your reading glasses or a magnifier. However, it is worth mentioning that a diamond tester will not help identify if a diamond is created or natural. Other methods are used to distinguish between them. These methods include detecting colour zoning, strain patterns, inclusions, fluorescence, etc. Very small stones heat up easily, large stone tend to stay cool, but we do get a spate of complaints during a heat wave when the temperature gets into the thirties.

The Presidium diamond testers are designed to help you to distinguish the difference between diamonds and other stones. The Presidium Multi Tester and Diamond Mate Tester measure the thermal and electrical properties of loose and mounted diamonds, Moissanite and other colourless stones – including spinel, cubic zirconia and zircon – whereas the Presidium Gem Indicator has the ability to identify up to 31 different coloured stones. There are three types of diamond that are electrically conductive and will therefore show up as Moissanite on Moissanite testers and Multi testers. Make sure you opt for a device that uses electrical conductivity (heat + electricity): This type of model will help you test diamonds as well as moissanite. A more sensitive version of the Standard Presidium, above; and the design has been 'squished' to the size of a standard diamond tester. Diamond testers can be a helpful tool as part of a multi-stage test to determine if a diamond is authentic, but it should not be the only test. Diamond tester pens are a helpful way to separate out CZ from diamond. Sometimes moissanite can throw off a thermal conductivity diamond tester because they’re similar to diamonds in the way they conduct heat. To solve this problem,you can use an electrical conductivity diamond tester to test the stones because diamonds and moissanites conduct electricity differently.

Precision Scales

Diamond testers that measure only the thermal conductivity of a stone cannot tell a real diamond from moissanite as these two stones are very similar when it comes to interaction with heat. To get accurate results, you will need a tester that measures the electrical conductivity of a stone or combines both aspects because diamonds and moissanites conduct electricity differently. From this principle you can now see that if you 'break the circuit', the tester will not register 'Moissanite'. You can also see that many items are electrically conductive, not just Moissanite, for instance, your body, and many household objects, even your fridge or a moist finger.

works on any stone, you are not limited to jewellery that will fit over the sensor, you are not limited to transparent stones with a flat top (table), they even work on 'rough' (uncut) stones. The ARI will tell you, but nothing is 100%. For instance, the ARI won't give accurate readings on stones with a yellow-ish tint (the colour must be between colour-grades D and J); it won't give accurate readings on very small stones (under 2pts); it won't give accurate readings on with a very narrow pavilion (typically 'simple' cuts from the 17th to 19th centuries). Yes, that is what is so good about this one, it can test any mounted stones (other models either don't test mounted stones at all, or are limited to small rings).you know, from your experience, that a customer is offering you paste, he says it's white sapphire, you need to show him the result on a machine, because customers believe machines rather than expert humans. The Presidium ARI is an essential tool for the experienced jeweller and professional diamond dealer, it is for testing known diamonds.

you are in dispute regarding a stone that you know for certain is not diamond (because you have a diamond tester), it looks like diamond but it is an imitation - what is it? Presidium gauges are another way to test your stones. Fitted with clear and visible analogue and digital displays, the gauges are designed to convert gemstone dimensions to carat weight. Suitable to use with loose and mounted stones, gauges are designed to provide accurate measurements and instant results. As with all Presidium testers, an instruction booklet is provided with full details. Would this work with rough stones? I mean rough diamonds ? And show the difference between man made and natural?

REGISTER FOR AN ACCOUNT

battery-operated plus USB port for alternative power source and (if required) to connect it to a computer So if you are testing a large stone and there's a slight reaction with the lights, you know it cannot be diamond, even if the lights tip into the DIAMOND zone (test it again, turn the sensitivity right down). Stones must be Brilliant Cut (modern, round) and perfectly-cut in proportion, it will not test shallow stones. For the non-expert: make sure the stone is recent (eg not from the 19th century) and is round. For the professional jeweller: if you specialise in Victorian jewellery (or earlier) this tester might not be suitable, it will not give accurate results on rose-cut etc. Thermal testers work on heat. Their advantage is simplicity, touch the probe on the stone, see the reading, no skill and no special training is required. Disadvantages: they only work at room temperature (typically between 19 and 26 degrees C); they only test for a few stones and (as you see from the picture below) many of the readings overlap. the stone must be transparent and must have perfectly flat, perfectly polished top (table) which will fit over the sensor hole; if the stone is tiny (under 3mm) you will struggle to get a reading; if an item of jewellery is too large (or lumpy) you won't be able to rest the stone over the hole