How to tell the difference between a diamond and a moissanite

posted 3 years ago in Rings
Post # 2
Member
177 posts
Blushing bee

The Moisseys are easy to spot. They are usually lager and sparkly. I mean that they are usually HUGE with awesome specs but you can tell it’s not a diamond. They are different gems after all,

Post # 3
Member
646 posts
Busy bee
  • Wedding: November 2017

Moissanites have double refraction while diamonds have single refraction. That means that a moissanite is much more brilliant than a diamond. And because they are lab grown they are often more perfect in terms of clarity. But you would really have to be an expert to tell the difference. There are tools that are used to validate that a diamond is in fact a diamond and not an imitation. In many cases these tools cannot determine that the moissanite is not a diamond. It takes a trained eye. 

Post # 5
Member
1815 posts
Buzzing bee
  • Wedding: June 2016

munchkinbee :  I had my moissanite at the jeweller the other day. The younger jeweller didn’t know it was moissanite – the older one was pointing out the double refraction. They often both test as diamonds on a diamond meter, because the moissanite is very hard like a diamond (9.5 on Mohs scale vs. 10).

Sometimes you can tell because the moissanite gives off more colourful sparkles, and the older ones look like thin fragments. The newer ones are cut the same way as diamonds (the new Hearts and Arrows cut you hear so much about). It’s not as good a cut to show off the brilliance of the moissanite – so it’s not as sparkly, and also doesn’t have the shattered glass look. I find it’s really hard to tell the difference between H&A cut in Diamond and Moissanite.

Of course, if you’re buying you can tell by the size and cost. A moissante is much cheaper than a diamond, but not as cheap as CZs. People usually buy much larger stones with moissant because you can afford them. This was a debate we had here the other day. If I see a 2 or 3 carat stone, my first guess is that it’s moissanite – I’m not always right, but the odds are in my favor

If the stone is 1 carat or less it’s going to almost always be a real diamond. I follow the moissaniteCo Instagram site – and you regularly see 3 ct and 4 ct stones, but only 2 or 3 times have I seen a 6mm stone – which is a bit under a carat.

Usually Moissanite engagment rings are between $800 – $2500, depending on the size of the stone, and metal used. Of course, diamond rings can be $100 000+ depending on size of stone and quality. If you see a 1 carat engagment ring for $1000 it’s not diamond.

Post # 6
Member
1124 posts
Bumble bee

Before these new brands and new cuts came out I think it was fairly easy to tell. the rounds have the splintery facets and the cushions,ovals,and radiants all have a distinct look to them.  But now with the hearts and arrows F1, the harro gem crushed ice elongated cushions, crushed ice skinny ovals, emerald cuts with windmills etc.. it’s definitely getting harder to tell. I was looking on harro gems instagram today and was completely blown away! 

Post # 7
Member
692 posts
Busy bee

I can tell easily with the round brilliant cut (the splinters just stick out to me- especially in the FB stones) I’ve even spotted some on IG that people are passing off.. I can’t tell with the hearts and arrows cut.. it’s just too close to call. There might be minor differences, but in passing I would honestly have no idea. 

I actually went to a jeweler (in los angeles with 20+ years experience) with an Amora Gem Soaring Hearts. He didn’t know it was moissanite til he looked in the loup and inspected it. He said after it’s set (in a halo) even he would have a hard time telling, short of taking the ring off and louping it intensely.  

I agree with bellabee, harro gems is killing the ovals and elongated cushions. There have also been a lot of moissy ACC’s that I really can’t tell apart from diamonds.

ETA: Most things that will “give away” moissanite (at least in the new cuts) are things only jewelers would know- or be able- to look for. 

Post # 8
Member
2573 posts
Sugar bee

Size has nothing to do with it. There are plenty of large diamonds too. There are a few things to look for. The older moissanite was much easier to tell apart from diamond because of the splintery pie facets, large table, shallow cut and the greenish undertone. I agree with PP the cut has greatly improved with the H&A F1. However, moissy is just generally more rainbowy. And since it is double refractive you can see facet doubling in some macro shots and under the microscope. The lack of inclusions coupled with facet doubling tell it apart from diamond. I have both and love both. I know that moissy is marketed as a sim, but it is a gem in its own right in my eyes! It has some really cool, unique qualities. 

Post # 9
Member
2573 posts
Sugar bee

I should say the average diamond usually has some inclusions or “clarity characteristics”. You won’t find much going on inside of a C&C moissanite in regards to specs and spots. A lot of people say the India moissanite have terrible clarity though.

Post # 10
Member
8440 posts
Bumble Beekeeper
  • Wedding: April 2013

I think it’s a lot harder to tell in photos than in person or a video.  My moissy tends to give off a lot of rainbows, but doesn’t neccesarily picture that way.  Even with the different characteristics, I have to tell people that it’s a moissy and not a diamond.  However, I have a “smaller” stone in terms of moissanite (6mm/0.75 ct).

Post # 11
Member
80 posts
Worker bee

We just received my moissanite (not asked yet, so it’s not on my finger), I’ve spent time looking at it next to the diamonds my mother passed down to me.

My moissy is brigther than my mother’s stone, simply I think because the moissy is G-H, I am not sure about the color of her diamonds. There is also the fact that the moissy is way bigger, cushion cut, equivalent of 2 carat, and my mom’s center stone is a round which is around .8, I think.

Also, as someone mentioned moissy are lab made. Mine is a NEO moissanite, it’s incredible. I absolutely love it, at times it looks like my mother’s diamonds but in different lights the rainbows it gives off… simply stunning! I also understand how this may not appeal to some, that’s the beauty of it, to each their own! 

I am thrilled that we have gone with the moissy and can’t wait to wear it. I also think that they have come a long way and I’m happy that mine is not “warm” though I think some look beautiful, I wanted a clearer stone.

It’s not a diamond, I won’t pass it as one. I have a lot of different reasons as to why I wanted a moissy over a diamond. Here are some photos to compare the two. 

This was taken in my room, with very dim lighting, and turquoise walls. Sorry for the big pics, hopefully not too pixelated, I do not know how to resize them…

This was taken in my master bathroom where due to the lighting every thing sparkles like crazy. It’s in this lighting and in direct sunlight that the moissy gives off the rainbows I love so much!

Post # 13
Member
2891 posts
Sugar bee
  • Wedding: November 2017

munchkinbee :  sun  pie shaped lines such as in this pic 

Can see haziness and dark nailhead (extreme older pic) above. Below dark center from shallow cut to offset double refraction. Also looks like it may be developing the recurrent film stain that moissanite can get.

Post # 14
Member
751 posts
Busy bee
  • Wedding: September 2016

bklyn18 :  omg those harro gems ..I am waiting to see someone on here with one in the elongated cushion. It’s really freaking beautiful!!

Post # 15
Member
751 posts
Busy bee
  • Wedding: September 2016

GemmaBella :  yup ordered one from India and it was so bad I mailed it back the same day. Horrible 

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