Last time we checked in on Open! Design’s Sergei Kuzhavsky and Stas Zhitsky, they were bending golden nails into jewelry.

The provocateurs have a new collection in the works called “Down with Diamonds!,” featuring this gold ring. On one side, a 1-karat diamond. On the other, a cubic zirconium imposter! Will a girl be able to recognize which one is her best friend? You’ll have to buy one to find out, so hurry! There are only nine in existence. Just remember not to be that jerk at the party who makes everybody guess.

Open! Design and Concept Studio