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How Do You Tell the Difference Between Moissanite and Diamond?

Date Added: 20/08/2013


How Do You Tell the Difference Between Moissanite and Diamond?


If you want to tell the difference, there are two distinct and easy things to look out for: double refraction and polished girdle. First, you need to use a loupe (jewellers magnification).

Double Refraction: 

With a loupe, look through the crown of the jewel towards the pavilion of the stone. You will see a double refraction like the image below. You do not see these 'train-track' looking lines with diamond.

Polished Girdle:

The girdle (or the rim of the jewel) is polished or smooth in Moissanite. With diamond, you will see a faceted girdle like the picture below which shows a diamond's girdle at 40x magnification.


These are the two most effective and accurate ways to tell the difference between Moissanite and diamond. 


If you don't have access to a loupe or high magnification, drop into one of our stores anytime - will be happy to show you.  


Moi Moi on Channel 9's TODAY Show

Take a look at this recent video on The TODAY show, comparing one carat rings set in 18k white gold  One is a SUPERNOVA Moissanite ring which cost $1,900, the other is a $11,000 Diamond ring.  Can you tell the difference?

Even experts sometimes confuse Moissanite for diamond

Moissanite commonly gets mistaken for diamond. And not just by people who don't know about jewellery, even the experts can confuse Moissanite for diamond.

We custom made a ring for a client down in Melbourne last year. It cost $2,500. Our client could not believe it when they took it to their local gemmologist and valuer and it came back valued at $28,000! The expert thought our Moissanite ring was a diamond. That is how amazing Moissanite is.

The National Council of Jewellery valuers invited us to further educate their members on how to distinguish Moissanite from diamond and also about how Moissanite has improved in quality over the years.

When Moissanite was first released, it was quite yellow in colour. 

Now, with huge advancements in technology, we are able to produce far better quality Moissanite than ever before. SUPERNOVA Moissanite is by far the most desirable and natural looking Moissanite available.  In sunlight, SUPERNOVA Moissanite has zero fluorescence and no blue tint.  It looks like a high-quality diamond.

Origins of Moissanite

Moissanite is undoubtedly the best diamond alternative available, however, you may not realise it is a jewel in its own right.

Moissanite, in its natural form, is so extremely rare you can only find minuscule quantities in a 50,000 year old meteorite crater site in the Diablo Canyon, Arizona. Moissanite is made from a natural mineral Silicon Carbide.  These miniscule quantities were discovered in the late 1800's by Dr Henri Moissan and was later named Moissanite in his honor.  Because naturally occurring Moissanite is too rare for jewellery purposes, we now use heat and pressure in a lab, using the same natural mineral - Silicon Carbide, to produce beautiful gem quality pieces.  All Moissanite stones are hand cut, just like diamond.

Moissanite is made of Silicon Carbide, Diamond is made of Carbon. They are very similar minerals, but they have different qualities.  If you use a diamond tester, Moissanite will test as a diamond. No other jewel other than diamond will test as a diamond, like a Moissanite does.  We recommend that if you purchase any diamond, make sure it has certification!  Or you could buy a Moissanite, which will always be my personal preference.

Moissanite sparkles just as much as a diamond, in fact, more, just look at the GIA results. It costs a fraction of a diamond of the same size and quality and I promise it will last forever.  You  can wear Moissanite exactly the same way you would any diamond. 


If you're interested in learning more about Moissanite read our blog here's some of our most popular reads for you: 


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