Can Moissanite Pass a Diamond Tester?
If you’re wondering “can moissanite pass a diamond tester?” — the answer is yes, it often can, especially with basic or older testers. But this doesn’t mean moissanite is a diamond. The reason lies in how these testers actually work.
How Diamond Testers Work?
Most traditional diamond testers measure thermal conductivity, which refers to how quickly heat passes through a stone.
Diamonds are known for their ability to conduct heat extremely well, which is why they show a positive result on these devices.
However, moissanite also has very similar heat-conducting properties, making it difficult for basic testers to distinguish between the two.
Why Moissanite Can Pass a Diamond Tester?
The main reason moissanite can pass a diamond tester is because:
- It conducts heat almost as efficiently as a diamond
- Basic testers are designed to detect low-conductivity stones like cubic zirconia
- They are not sensitive enough to detect the small differences between moissanite and diamond
Because of this, moissanite can often test as “diamond” on cheaper or older devices.
Moissanite vs Diamond Tester Results
| Feature | Diamond | Moissanite |
|---|---|---|
| Thermal Conductivity | Very High | Very High |
| Electrical Conductivity | Low | Higher |
| Basic Tester Result | Diamond | Often shows as Diamond |
| Advanced Tester Result | Diamond | Correctly identified |
Can Modern Diamond Testers Detect Moissanite?
Yes. Modern testers are designed to measure both thermal and electrical conductivity.
Since moissanite conducts electricity differently than diamonds, these advanced devices can easily tell them apart.
Is There a Reliable At-Home Test?
Not really. Most at-home diamond testers only measure heat, which means:
- They can give false results
- Moissanite may appear as diamond
- They are not 100% accurate
So while they’re useful for basic checks, they shouldn’t be relied on for final confirmation.
Best Way to Identify Moissanite vs Diamond
For accurate results, it’s best to:
- Visit a professional jeweller with a modern tester
- Get certification from a gemological laboratory
These methods ensure clear and reliable identification.