René Boivin rock crystal ring, French, mid 20th Century.

René Boivin rock crystal ring. Set with a central round old cut diamond in a platinum rubover setting with an approximate weight of 1.00 carats, flanked by two curving channel set rows of rectangular French cut emeralds in yellow gold rubover settings, fourteen in total with an approximate combined weight of 1.20 carats, further flanked by two curving channel set rows of rectangular French cut rubies in yellow gold rubover settings with a combined weight of 1.00 carats, all to a conforming heavy sculpted tapered and curving D-shape band of rock crystal. Tested yellow gold and platinum, French, mid 20th Century, accompanied by official supporting documentation from Parisian expert Francoise Cailles confirming the piece is by Rene Boivin, mid 20th Century.