does moissanite pass diamond tester 

Moissanite is a beautiful alternative to diamonds. It looks like a diamond and is often misidentified, mainly when using a basic diamond tester.

For example, if you use a thermal conductivity test, it is often difficult to tell the difference between moissanite and diamond due to their similar thermal conductivities.

They have different electrical properties, so testing conductivity is more accurate and precise, helping to avoid confusion with moissanite used in diamonds.

What is Moissanite?

Moissanite is a natural mineral extracted from the earth. It looks very similar to a diamond. Moissanite has a fascinating and mysterious history that some consider a myth.

 What is Moissanite

The history of moissanite can be summed up as follows: moissanite was first discovered at the site of a meteorite impact in the Arizona desert.

Most natural moissanite has been found at meteorite impact sites around the world. Therefore, it is safe to say that natural moissanite has come a long way to reach the earth.

What is Moissanite? This gem is made of silicon carbide or SiC. There is evidence that most of the silicon carbide grains in moissanite originate from asymptotic giant stars (branch stars), which are rich in carbon.

Check out our article The Difference between Moissanite and Diamond

Does moissanite pass the diamond tester? Read on for our article; HER'S will tell you the answer.

How Does the Diamond Tester Work?

A trained professional can usually identify moissanite by its distinctive fire. This is not a scientific method and requires specialized equipment to differentiate between diamonds and moissanite.

A diamond tester is one solution. Diamond testers were first introduced to the jewelry industry to help identify natural and fake diamonds.

It is used to measure the thermal conductivity of gemstones. This property distinguishes diamonds from imitation diamonds and other gemstones because diamonds are excellent conductors of heat. Testers can determine if a gemstone is a real diamond by watching how heat passes through it.

Does Moissanite Pass Diamond Tester?


A diamond tester is the most commonly used gemological device for testing diamonds. However, it is not the best choice for moissanite testing as it only detects the conductivity of the gemstone.

Testers were unable to distinguish moissanite from diamonds or other gemstones such as cubic zirconia. This means that testers cannot distinguish moissanite from diamond, and moissanite passes the diamond's thermal test.

You might be wondering why. You might be wondering why? Some diamond testers are not calibrated correctly, and in many cases, there will be a difference.

Despite all the flaws, gemologists and jewelers still use diamond testers. A second tool is also required to differentiate the two gems.

Moissanite is a mixture of diamond and moissanite. However, this difference can only be detected using specialized equipment.

It is recommended that you test your samples with a moissanite tester and diamond tester to test moissanite and diamonds.

The advantage of the Multi-tester (Moissanite/Diamond) tester is that it can detect any slight changes in thermal conductivity and electrical conductivity. Although the tester is expensive, you can expect accurate results.

Other Ways to Test Moissanite

Even if you don't have a multi- or moissanite tester, it's still important to confirm the identity of the gem you're buying.

There are many ways to test moissanite. Here are some other practical and alternative ways to test moissanite:


Birefringence is a sign that a jeweler's eye can see through a magnifying glass. Birefringence occurs when light travels through a particular stone and is slowed, bent, or split in two.

A trained eye can easily see this quality even under a 10x magnifying glass. But only if you know what you should be looking for.

Birefringence causes the lines of light to blur and multiply through the facets. A diamond can be seen as a clear, sharp line through the gemstone, rather than a vague one.

However, Moissanite is intentionally cut; it is not birefringent when viewed from the top/table. This effect can only be seen on the sides or through the crown facets.

These properties are also present in other gemstones, such as sapphire and tourmaline, which means you will need more precise numbers to distinguish moissanite from diamonds.

Moissanite has an index of refraction of 2.63 compared to 2.42 for diamond.

In Conclusion

The jury is still out on whether moissanite passes the diamond test. Some say the tester is not calibrated to recognize moissanite, while others believe that moissanite will give the tester different readings. 

Do you know how to clean moissanite? If you haven't already, let's check out our guide now: How to Clean and Care for Moissanite