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

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Opt for the latest model: technology is constantly changing everywhere, and that’s the same for diamond testing detectors as well. The latest models combine heat and electricity testing for the greatest accuracy. 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. Firstly, a very rare type of diamond (imaginatively named Type II). These are indistinguishable from other diamonds. It's merely a quirk of their chemical composition that they happen to be electrically conductive - which is why they register MOISSANITE on multi testers. These are rare, you might never come across one, but they do exist, they turn up regularly at gem laboratories, to settle disputes arising from the use of testers. you have been given a parcel of stones and want to pull out those that are 'interesting' and worthy of further investigation.

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 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. Our laboratories are in three global locations: Antwerp, Surat, and Maidenhead. At allour facilities, our experts use comprehensive analysis using a variety of different in-house and proprietary equipment to ensure that every diamond we assess is natural. To test if a diamond is real, you will need to place the tip of the tester on the stone’s surface and detect the rate at which heat or electricity moves through the gem. If the diamond is genuine, the device will indicate that on the display and give a sound signal. What Type of Diamond Tester Is Better?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. not as accurate as an optical refractometer, it's possible (as with all electronic testers) for the display to 'drift' and not give correct readings.

Firstly, only test items that are likely to be diamond, this does not include your fridge or your finger; a Moissanite reading from your fridge or finger does not mean the tester is broken, it means that you are supposed to know that they are not made of diamond. And only test items which show up as 'Diamond' on a diamond tester. If you do not have a diamond tester, then a Moissanite tester will be of no use to you. The purpose of a Moissanite tester is to know if a stone that tested as diamond really is diamond, or if it is Moissanite. My advice: if you want to test diamonds/Moissanite in a busy shop or at markets and fairs, get a Diamond/Moissanite ('multi') tester, they are very easy to use, especially if you are working under pressure. If you are working in an office where you can sit comfortably at a desk and work slowly and carefully, then get a reflectivity/Refractive Index gem tester as listed below. If you manage a group of stores (or an auction house) that does both - then get both. THERE ARE TWO TYPES OF ELECTRONIC GEM TESTER You might be curious how diamond testers work. It tests the stone for its thermal and/or electrical conductivity. Thermal conductivity diamond testers measure the amount and speed that heat travels through the stone. Electric conductivity testers measure the amount and speed that electricity travels through the gemstone. Natural diamonds grow, naturally, deep in the earth as 'rough' diamond crystals (mined diamonds). Synthetic diamonds are grown by man in a laboratory. Synthetics and naturals are identical, they are both diamond. That is why it is so difficult to tell them apart; that is why these testers are expensive. Find out more about this at our guide to synthetic-diamond testing .You notice that there isn't a reading not diamond ("simulant"); if you are not a diamond dealer or experienced jeweller you must be certain you are testing a stone that will register 'diamond' on most diamond testers; testing non-diamonds on a Synthetic Diamond Tester can give incorrect readings. Technical De Beers Institute of Diamondsnow offers a Set Diamond Service, a diamond jewellery testing service designed to ensure that all diamonds within your jewellery are natural. GIA instruments have been deepening industry knowledge of gemstones and helping build consumer trust since the 1930s. When working with loose gemstones – whether that’s diamonds, rubies, emeralds or more – being able to verify authenticity is an essential part of the manufacturing process. Presidium are the leading provider of gemstone testers and gauges designed to provide jewellery makers with the tools they need to ensure that they can verify loose and mounted gemstones with accuracy.

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. You can see from the picture which stones it will test, also note how the readings overlap. It is for this reason that I say the tester is best for showing what a stone is NOT rather than what it is, e.g. a customer is offering you a sapphire, you can see that it might be glass, it might be garnet...but it can't possibly be sapphire. Despite its limitations, it is still useful for pulling out gemstones worthy of further investigation, e.g. you may be interested in stones that might be ruby/sapphire and not at all interested in anything that is probably glass. It is also particularly easy and fast to use and can be used on any stone no matter how it might be mounted. not ideal for buying at outdoor venues when it's cold, the tester must be used at room temperature. NO REACTION, if it's low thermal thermal conductivity (those that never give a reading on a standard diamond tester) - it could be anything, but it's not diamondGemlogis was co-founded by a gemmological precision engineer who brought early influence to the handheld diamond tester machine two decades ago. With headquarters in Hong Kong, a research center in Singapore, and its own manufacturing facilities in China, Gemlogis established its status as one of the market leaders for diamond testers and color stone meters. Throughout the years, Gemlogis worked closely with universities and gemmological institutes around the world to study and research various trends and technologies.