A turquoise and diamond Cartier cocktail ring circa 1960.The bombé design features pavé-set diamonds on one side and cabochon turquoise beads and brilliant-cut diamonds on the other.  The ring sold for £17,500, nearly quadruple its pre-sale estimates.

A turquoise and diamond Cartier cocktail ring circa 1960.The bombé design features pavé-set diamonds on one side and cabochon turquoise beads and brilliant-cut diamonds on the other. The ring sold for £17,500, nearly quadruple its pre-sale estimates.