Diamond or Moissanite??? Pawn shop find

[Scon_ce]

When I first saw this ring in December it was priced and labeled as a 1.3 ct diamond. I took a look at it again today at the same pawn shop and it is now labeled as Moissanite and priced accordingly. On today’s visit the SA used a tester on it and it tested positive for both diamond and Moissanite. Thoughts?

 

[Scon_ce]

 

[Rfisher]

Does the girdle look smooth or faceted?
Does some of the faceting look ‘twinned’ from moissanite double refraction?
That’s a clue, but I don’t think definitive- and hard to tell from photos sometimes.

My guess is moissanite.

 

[dk168]

Can't tell from the photos alone.

Use a 20x or higher loupe to check if double refraction could be observed - double refraction is indicative of Moissanite.

DK

 

[Rons Wolfe]

With them having relabeled and lowered the price, I'd think it's safe to say it's moissanite.

 

[lovedogs]

My guess is that its moissanite.

 

[Sibsgirl]

The last picture shows the double refraction in the stone if you look closely. I'd say it's moissanite.

 

[canuk-gal]

HI:

Perhaps it was purchased, and subsequently evaluated by a gemologist, then returned when it not found to be as represented. Might explain a few things.

cheers--Sharon

 

[Garry H (Cut Nut)]

Generally you need to look through the kite shaped facets at the culet to see the doubling.
A decent 10x loupe is all you need

 

[Bron357]

Thermal testing of gemstones can be helpful differentiating between say CZ and anything else, garnet from ruby and blue topaz from zircon but they can’t differentiate between lab grown and natural. Moissanite and diamond have a similar heat signature so thermal testers can’t be used. Instead using a loupe you look for double refraction (it’s like a bit of blurriness) or the inclusions. Diamond inclusions are specific to diamonds whereas Moissanite will usually only have one type which are like needles.

 

[Garry H (Cut Nut)]

Thermal testing of gemstones can be helpful differentiating between say CZ and anything else, garnet from ruby and blue topaz from zircon but they can’t differentiate between lab grown and natural. Moissanite and diamond have a similar heat signature so thermal testers can’t be used. Instead using a loupe you look for double refraction (it’s like a bit of blurriness) or the inclusions. Diamond inclusions are specific to diamonds whereas Moissanite will usually only have one type which are like needles.

On top of that Bron, yes no instruments in the hands of 90% of people are a recipe for expensive disasters. I have an oldfashioned thermal probe where you assess the thermal reaction buy the speed of the needle movement.
What you see is the size of a gem makes a very big difference, as does the amount of metal in contact with the stone and the metal alloy.
Here are some quick doubling images

 

[headlight]

On top of that Bron, yes no instruments in the hands of 90% of people are a recipe for expensive disasters. I have an oldfashioned thermal probe where you assess the thermal reaction buy the speed of the needle movement.
What you see is the size of a gem makes a very big difference, as does the amount of metal in contact with the stone and the metal alloy.
Here are some quick doubling images

Love the last image with doubling of discoid fractures!!!