Vintage Cabochon Opal 14ct Gold Modernist Ring Brutalist Tree Bark Cocktail Ring

This beautiful Mid Century, Modernist Brutalist large cocktail ring is crafted from the highest quality materials ,14ct Yellow Gold, and High Quality Light white precious opal and is one of the prettiest and one of the most ladylike rings we have in our current collection! 
Set with Cabochon Opal on a very high coral abstract setting it's just full of 1960's charm! 
It is perfect for special days and no one able to take their eyes on it. 
Is it also Stamped Maker Mark CAC