Do Moissanite Earrings Pass a Diamond Tester?

May 22, 2026|Corentin Lacaze

It’s one of the most common questions people ask before buying moissanite:

“Will it pass a diamond tester?”

Short answer?

Yes — moissanite earrings do pass most diamond testers.

But there’s more to it.

Let’s break it down.

What Is a Diamond Tester?

A diamond tester is a small device used to check whether a stone is a real diamond.

It works by measuring:

thermal conductivity (how heat passes through the stone)

Diamonds conduct heat extremely well —

and that’s how testers identify them.

Why Moissanite Also Passes

Here’s the important part:

Moissanite has very similar thermal properties to diamonds

That means:

it conducts heat almost as efficiently
it reacts the same way on basic testers

Result:

Most standard diamond testers will register moissanite as “diamond”

Can Diamond Testers Tell the Difference?

Not always.

Basic testers:

❌ cannot distinguish between diamond and moissanite

More advanced testers:

✅ can sometimes detect moissanite using electrical conductivity

But those are:

less common
more expensive
not what most people use

What This Means for You

In real life?

Most people will NOT be able to tell the difference.

visually → looks the same (or even better)
on a tester → often passes
in everyday wear → indistinguishable

The Bigger Question: Does It Matter?

Let’s be honest.

People don’t walk around testing jewellery.

They notice:

shine
clarity
how it looks on you

And this is where moissanite wins.

Moissanite vs Diamond (Real Talk)

Moissanite offers:

more sparkle (higher brilliance)
better value
modern, ethical production

While giving you:

the exact same luxury look

Why More People Are Choosing Moissanite

In 2026, the shift is clear:

People want the look — not the hype.

Moissanite delivers:

premium appearance
strong durability
smarter pricing