[Top Hats] So Here's the Deal

Diamonds. They tell us that they're a girls best blah blah blah

here's the thing.
diamonds are actively worthless. If you remove the massive mark up that is worked into them by the cartel that mines ships and sells them, a 200ct diamond would have the same trade value as a can of baked beans. [this is a mild exaggeration. it would be a large case of beans.]

can you tell me which of these is a real diamond?

I Assure you that only one is a real diamond. 

Now. why buy something that's so expensive but so easy to confused with a fake? 

isn't this prettier and more striking than a peice of high density glass?

 

Yes No Maybe? 

[those rings are in order; Fire Topaz, Ruby, Emerald]

And since I know you are still wondering, the 'diamond' on the left is the fake. 

And because she is weird, and likes rose gold. There is this;