Does Moissanite Pass a Diamond Tester?
Yes - moissanite can sometimes pass a basic diamond tester, but it depends on the type of tester being used.
Many traditional diamond testers measure thermal conductivity (heat transfer), and moissanite conducts heat in a way that is similar to diamonds. Because of this, some basic testers may incorrectly identify moissanite as a diamond.
However, advanced jewelry testing equipment can reliably distinguish moissanite from natural diamonds by measuring additional properties such as electrical conductivity and light performance.
In other words: basic testers may be fooled, but professional jewelers usually are not.
Why Does Moissanite Pass Some Diamond Testers?
The main reason moissanite sometimes passes a diamond tester is because of how the gemstone handles heat.
Traditional diamond testers are designed to identify diamonds based on thermal conductivity. Since moissanite transfers heat in a similar way, the tester may produce a positive result.
This does not mean moissanite is a diamond. It simply means both gemstones share similar thermal properties.
Types of Diamond Testers and Their Accuracy
| Tester Type | Can Detect Moissanite Correctly? |
|---|---|
| Basic Thermal Tester | Sometimes No |
| Advanced Diamond Tester | Usually Yes |
| Professional Jeweler Equipment | Yes |
Basic testers sold online are more likely to mistake moissanite for a diamond.
Professional jewelers often use more advanced tools that analyze multiple characteristics to accurately identify gemstones.
Can Jewelers Tell the Difference Between Moissanite and Diamond?
Yes, experienced jewelers can usually tell the difference between moissanite and diamonds.
They may use:
- advanced gemstone testers
- microscopes
- magnification tools
- light performance analysis
In many cases, jewelers can also recognize moissanite visually because it tends to produce stronger rainbow flashes, sometimes called “fire,” compared to the more subtle sparkle of diamonds.
Does Passing a Diamond Tester Mean Moissanite Is Fake?
No. Passing a basic tester does not make moissanite “fake” or dishonest.
Moissanite is a real gemstone made from silicon carbide and widely used in fine jewelry, engagement rings, necklaces, and earrings.
It is considered a legitimate alternative to diamonds rather than a fake diamond.
Is Moissanite Worth Buying Even If It Isn’t a Diamond?
For many buyers, yes.
Moissanite is popular because it offers:
- exceptional sparkle
- strong durability for everyday wear
- significantly lower prices than diamonds
- ethical, lab-created sourcing
Many people choose moissanite because it delivers a luxury appearance without the high cost of natural diamonds.
FAQ
Will moissanite always pass a diamond tester?
No. Some basic testers may show positive results, while advanced testers can usually distinguish moissanite.
Can moissanite fool a jeweler?
Usually not. Professional jewelers have tools to identify gemstones accurately.
Why does moissanite pass basic testers?
Because it conducts heat similarly to diamonds.
Can fake diamonds pass diamond testers?
Some diamond simulants may fail immediately, while moissanite may sometimes pass basic thermal testing.
Is moissanite a real gemstone?
Yes, moissanite is a real lab-created gemstone made from silicon carbide.
Can you tell moissanite from a diamond with the naked eye?
Sometimes, but not always. Most people cannot easily tell the difference in everyday wear.
