Now, having said that. You are going to have a hard time finding a dupe to it in the USA. There are a few close polishes like Chemistry 507, Chemistry 519, Sephora Diving in Malaysia, and Golden Rose Metallic 03 but they aren't available in the USA. Some older polishes from Toma and Revlon could be a dupe but they are long discontinued. MISSHA HGR01 is in the same range but more green/blue. You can get that one on Ebay so that's handy but it's not a dupe. (On a side-note: If anyone has access and would like to swap for Sephora Diving in Malaysia and Golden Rose Metallic 03 drop me a note.)
I do think that companies watch trends and Peridot is going to be something new to most of the public. Not you all, of course, but to the general audience it will be. I hope that this will push companies to come out with more duochromes in a range of colors besides the typical blue/purple. Everybody and their mother duped Jade and Paradoxal so maybe a Peridot dupe will be on the market in the USA soon. Wouldn't that be wonderful?
Photos. It was hard to capture the green/blue flash but I hope these help you with your decision to buy it or not. This is two coats so you don't need to layer it over black which is a plus.