Shore of Seine is a dipping powder from Born Pretty Store which is metallic as well as duochrome. I have used this as a chrome powder rather than as a dipping powder, which makes it more versatile as it can be used both ways.
Shore of Seine is a metallic purple \ green shade.
Traditionally you would use this burnished in to a gel polish, however I used it over a normal black polish and a topcoat and it worked and looks pretty. You do need to use a water based topcoat over the top as a normal one does cause cracking and shrinking.
Without flash shows the duochrome off;
I have a 10% off discount code if you would like to use it;
Born Pretty Store 10g