What kind of diamonds pass diamond tester? Natural diamonds, lab diamonds, and non-diamond moissanite! This is because a handheld pen “diamond tester” actually only tests the ability of a gem to conduct heat. It does not test for whether or not the stone is, for example, pure carbon (like diamonds are).
Diamond testers are tools designed to identify whether a stone is a diamond by measuring thermal conductivity. Moissanite, a popular diamond alternative, has properties that can cause it to pass as a diamond on traditional diamond testers.
A diamond tester works by measuring the electrical conductivity of a stone, which is different for diamonds and most other gemstones. Moissanite is not a diamond, but it may occasionally fool a diamond tester because its electrical conductivity is so close to that of diamonds.
Our top-quality VVS colorless moissanite hits harder and outshines everything. They have a Mohs hardness rating of 9.25 - 9.5 out of 10 and will test positive as diamonds on a handheld diamond tester.
Diamonds have a unique thermal property that allows them to conduct heat faster than any other gemstone. A diamond tester sends a small electrical current to heat up the stone and then measures the speed at which the heat is conducted. If the stone conducts heat rapidly, it is likely a real diamond.
Can fake diamonds pass diamond tester? Yes, some diamond simulants can pass a diamond tester. For example, moissanite, a man made gem, may pass as a diamond on a standard tester pen.
Will a VVS Diamond Pass a Diamond Tester? Absolutely. Both natural and lab-grown VVS diamonds are real diamonds, and they will easily pass any standard diamond tester.
No, a jeweler generally cannot tell if a diamond is lab-grown just by looking at it with the naked eye; they need specialized, lab-grade equipment like GIA iD100 or X-ray luminescence (XRL) testers to detect subtle differences in growth patterns, impurities, or fluorescence, as lab-grown diamonds share the same chemical and optical properties as natural diamonds. While some jewelers have machines to test, professional grading labs (like GIA) use advanced methods to identify them, often relying on laser inscriptions and grading reports for confirmation.
Simulated diamonds, while durable, may not match the same level of hardness as natural diamonds. Value: Simulated diamonds are generally more affordable than natural diamonds, making them an attractive option for those seeking high-quality gemstones without the premium price.
The Gemological Institute of America (GIA), the world's leading authority on diamonds, has announced a big change. From late 2025, they'll stop using their famous 4Cs grading system for lab-grown diamonds. This move marks a definitive moment in the ongoing separation of natural diamonds from lab-grown diamonds.
Diamonds are another valuable type of jewelry and are also sometimes faked. Similar to gold, most pawn shops will start with tests that do not damage the jewelry in any way. Visual diamond tests including looking at how light reflects off the diamond as well as the weight of the diamond.
If your diamond is authentic, the tester is designed to make a beep-sound or have a small light on the device flash red.
Black gemstones are not tested by diamond testers. Diamond testers can detect only white diamonds. If you use a diamond tester on a black diamond, the result may not be accurate since black diamonds are opaque.
The Aquamarine name comes from the Latin word for seawater and is said to calm waves and keep sailors safe at sea. It is sometimes referred to as a poor man's diamond because of the pale color.
Moissanite. Moissanite is a form of silicon carbide that is typically produced synthetically. Due to its hardness (9.5 on the Mohs scale), it may be the diamond imitation material that comes closest to the real diamond in terms of durability.
Jewelers use a professional diamond tester tool that tests thermal conductivity to differentiate a real diamond from fakes. Diamonds disperse heat quickly, unlike many imitations. A diamond tester will indicate whether the stone conducts heat in the way a diamond should, offering a highly reliable assessment.
To choose a convincing fake diamond engagement ring, opt for a design that features a high-quality cubic zirconia or moissanite stone. These stones offer a similar appearance to real diamonds and are more affordable.
Mobile apps may mimic testing, but they can't match the accuracy of professional instruments. Your phone won't replace a professional appraisal, but it can assist. Use the flashlight to observe how the stone handles light. A real diamond will produce sharp flashes and concentrated brilliance.
The main disadvantages of lab-grown diamonds are their lower resale value and investment potential, due to mass production and increasing supply, and a lack of traditional sentimental value for those who prefer naturally formed gems with geological history. They also face market perception gaps, with some still viewing them as less prestigious or "fake," and their production involves significant energy consumption, though environmental benefits compared to mining are debated.
Costco sells diamonds with a cut grade of Good to Excellent. Although treating diamonds is an accepted practice among many jewelers, Costco only sells natural and untreated diamonds.
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.
No, cubic zirconia is not a diamond.
Why Does Moissanite Fool Some Diamond Testers? Moissanite is sneaky. It has a lot in common with diamonds, and one of its best tricks is heat conductivity. Older diamond testers rely on heat to tell if a stone is real, and since moissanite conducts heat almost as well as a diamond, these testers can get confused.