Using a Diamond Tester

Using a diamond tester is a convenient and inexpensive way to check the quality of a diamond, and can be a useful tool when identifying the differences between real diamonds and fake diamonds. A good diamond tester can help you identify the difference between electrical conductivity and thermal conductivity and can be used to assess the value of diamonds, gold, and other precious metals.

Electrical conductivity vs. thermal conductivity

Identifying the difference between a real diamond and a fake one is a complex task. While there are many methods that are reliable, not all are completely accurate. In order to get the most accurate result, you need to use a tester that tests for both thermal and electrical conductivity.

A thermal conductivity tester uses a needle-like metal tip to sense the temperature of an object. In contrast, an electrical conductivity tester uses a pad 110 and fingers 120 to measure the speed at which electricity travels through a stone.

A thermal conductivity tester uses the same principles as an electrical tester, namely, glass heat conductivity. Unlike an electrical tester, a thermal conductivity tester does not make a distinction between lab-grown diamonds and natural diamonds. It is also inaccurate in determining the thermal conductivity of moissanites.

On the other hand, an electrical tester uses the same principles as a thermal tester but makes no distinction between lab-grown diamonds and natural diamonds. In addition to its accuracy, an electrical tester is also faster, making it a better option than a thermal conductivity tester.

Another way to tell the difference between a real diamond and simulated diamond is to look at the fluorescence of the gem. Fluorescence is measured on a scale from one to five. If the gem is a white diamond, it will glow white, whereas a diamond-simulant will glow a more subdued red.

However, the best way to tell the difference between a real white diamond and a fake one is to use a thermal conductivity tester. This method is effective because of the diamond’s superior thermal conductivity.

It is also worth noting that the thermal conductivity of a diamond is five times better than that of copper, and that the thermal conductivity of moissanites is comparable to that of diamonds. However, diamonds and moissanites have different levels of thermal conductivity, so you cannot rely solely on a thermal conductivity tester to tell the difference between the two.

A multi-tester makes the best of both worlds by applying the heat conductivity test and the electrical conductivity test at the same time. This allows you to eliminate the need for reference gems.

Common diamond simulants

Several diamond simulants have been created over the years, each with their own chemical composition and optical properties. Some implants are man made, while others are natural. All have properties that distinguish them from diamonds. These stones can be distinguished from diamonds by external flaws and a poor polish. Fortunately, most implants are readily available for purchase through traditional jewelers.

Cubic zirconia is the most common and widely used diamond simulant. It has an atomic structure similar to that of a diamond but is more durable. It is 1.7 times heavier than an equivalent diamond. It is a man-made diamond simulant that was first synthesized in 1930. Since its commercial release in 1976, it has quickly dominated the diamond simulant market.

Zircon is a fairly hard mineral that is also often used as a diamond simulant. It often shows wear on the girdle and facet edges when cut. Zircon also shows a perceptible fire. Zircon has been mined in Sri Lanka for over 2,000 years and is still used in jewelry. It was once thought to be an inferior form of diamond.

White topaz is another common diamond simulant. It is colorless in its natural form, but it comes in a variety of colors. It is a durable stone that has a 9.5 Mohs’ hardness rating. It is also less expensive than cubic zirconia.

Synthetic rutile is another common diamond simulant. It was first produced in the 1950s. Currently, it is made almost colorless. It is also one of the hardest stimulant available.

Strontium titanate was also one of the first diamond simulants. It was developed by Leon Merker and Langtry E. Lynd. It was first commercialized in 1955. It was made using the trickle modification of the Verneuil process. It had superior optics and RI. It has since replaced synthetic rutile as the most popular diamond simulant.

Other diamond simulants include glass, rhinestones, and Swarovski crystal. Rhinestones are small, sparkling, natural quartz stones. They were first discovered in Austria in the 13th century. They were later called diamond-like stones.


Whether you’re a jewelry aficionado or a novice shopper, a good diamond tester will have you covered. The best ones are a bit of a splurge, but they are well worth the cost. They can be found in the form of a simple desktop or mobile unit. They are powered by batteries or an AC power adapter. They are made in the United States by a company based in San Diego, California. They come with a three year manufacturer’s warranty.

Unlike some of their more expensive cousins, they don’t require you to stow away your wallet. The best ones can be found in your local jeweler or jewelry department. Some are even sold as a kit. They can be a pain to set up, but once you have them installed, they’ll give you more than a few years of trouble-free testing. They come with a handy bag to keep your testers in.

The best diamond testers also come with a three-year manufacturer’s warranty. You can even purchase one with a bonus A/C power adapter for good measure. They also come with a handy carry bag for storing your testers and accessories. They are also compatible with rechargeable batteries, making them a worthy investment. The most common question is, “What diamond tester is the best?” The DT5 is a slam dunk. You can even use the device for individual item testing. They make the DT5 and the DT5S available in an array of colors, so you’ll be able to pick the one that best suits your fancy.

The DT5 also makes an A/C power adapter available in the box, making it one of the most convenient diamond testers you’ll ever own. It is also the smallest in its class, weighing in at only ten ounces. The manufacturer has also made a point of ensuring that you are properly informed about the device, from its specifications to its features to its capabilities.

Black Diamond Selector II

Using the Black Diamond Selector II diamond tester is easy. This device is perfect for flea markets, jewelry stores, and chain stores. It can test small and large stones. It uses 9-volt batteries.

Before you begin testing, read the instructions carefully. The Diamond Selector II will work best if you follow the chart on the back. This chart will tell you the standard gem sizes. You can then place the loose stone on the metal test platform.

Hold the tester in your right hand. Place the tip of the probe at an angle. You will then hear an audible beep. This is a constant beep, which indicates that the tip is touching the metal.

Detecting the diamond in a stone is based on thermal conductivity. Diamonds have a high thermal conductivity. This means that they will feel cold to touch. On the other hand, plastics and glass will feel warm.

For smaller stones, the sensitivity needs to be turned up. For larger stones, the sensitivity must be reduced.

You will get a feel for the tester after a few tests. After you have tested several stones, you will find that you don’t have to learn the chart on the back. You can also use a jeweler’s loupe to examine the stone. It is also useful to see the back facets of the stone.

The Diamond Selector II diamond tester can also be used to test mounted stones. It works well for flea markets, jewelry stores, and pawn brokers. This device also offers two-tone scales for measuring diamond versus non-diamond.

The Black Diamond Selector II diamond tester is the best buy for anyone interested in jewelry testing. It offers professional-grade features at an affordable price. This diamond tester is ideal for jewelers, flea markets, chain stores, and pawn brokers.

The Diamond Selector II diamond tester works with all diamond sizes and shapes. It can test small stones, mounted stones, and unmounted stones. The battery is included in the delivery.

Before you begin testing, clean the diamond tester tip. Rubbing the tip on paper will help remove any dust.

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