This is a concave cut piece of Zincite crystal!
The stone is 4.95mm in diameter, so it will fit a calibrated 5mm setting.
It has a beautiful true orange color, the concave cut adds a lot of radiance to the stone due to the way it is cut.
You'll receive the exact stone pictured, this is the only stone I have like this in stock.
Origin: Poland
Cheers,
Austin