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

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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. 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? Here are some independent evaluations from two internet forums run by gemmologists. Gemmologists are scientists, they are not interested in sales hype: By contrast, a large ruby or sapphire will move the LED segments up slowly, and other (very large) stones may or may not produce any reaction at all.

Gemlogis are the proud owners of several patented diamond testers for sale, and continues to come up with breakthrough features in handheld and desktop diamond testing machines.The test-tip (probe) on the tester must be clean, especially if it hasn't been used for some time. Clean it by rubbing it (at right angles) on in a circular motion on an ordinary piece of paper. This is stated in the instruction manuals of most models, along with a diagram. On a diamond-only tester, the tester will become less sensitive if the tip is dirty, i.e. you'll have to turn the LED Lights (sensitivity) up higher than usual. With a multi-tester, both diamonds and Moissanite will sometimes read, "Other stone", though not necessarily on every test, which will give the impression the tester is 'not consistent' or 'erratic' or "not reading diamond on known diamonds". Cleaning the tip fixes these problems. 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. OTHER STONE, if it's medium thermal conductivity, especially rubies and sapphires, plus anything really cold (which would give a 'slight' reaction on a standard row-of-LED-lights diamond tester)

The Presidium ARI is not for testing diamond v. non-diamond. It is for showing you the chance of a diamond being natural (originating from the earth) or synthetic (manmade in a laboratory) - both are 'real' diamond. The ARI also distinguishes diamond from Moissanite. A synthetic-diamond tester is for the experienced jeweller and professional diamond dealer. The GIA iD100 ® uses advanced spectroscopic technology to distinguish natural diamonds from laboratory-grown (HPHT and CVD) diamonds and diamond simulants. The GIA iD100 can test colorless to near-colorless, green-to-blue and brown diamonds, as well as pink diamonds when used with the GIA iD100 Pink Diamond Software Upgrade. 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 . it's not as versatile as an optical refractometer, you only get one reading for each stone (technical: you can't measure the birefringence). This means that if you want to distinguish diamond simulants you need to compare actual stones (get a sample set of stones: YAG, GGG, synthetic sapphire, synthetic spinel, zircon, strontium titanate and cubic zirconia) if you are quite happy to work slowly and carefully in laboratory-clean conditions but you must have a machine that will positively identify any stone: such a tester does not exist

For the non-expert: if it has any colour (e.g. the tiniest slightest yellow tint) you won't get an accurate reading. It takes an expert to colour-grade a stone, to the non-expert Colour Grade D will look exactly the same as Colour Grade J. For the professional jeweller: if you work at a shop counter and don't understand this, please ask your diamond expert to colour-grade the stone for you. A natural diamond tester is the tool for identifying natural earth-mined diamonds out of synthetics, potentially treated stones and Type IIa diamonds. if you understand the limitations of gem testers but there really is no way you have time to keep the tester meticulously clean and clean every stone before every test, and you cannot guarantee that it will never be bumped or dropped or get dusty or damp. 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).