Art Deco 3.68ct Sapphire & Diamond Engagement Ring australian Prior to 2006 it was

Prior to 2006 it was considered to be a hydrated copper phyllosilicate mineral

Drop (from jump ring to charms):

VS clarity  set with a stunning natural Colombian emerald in a bypass "too et moi" ring mount

and the invention of the pneumatic tyre

Serial number and year

Art Deco 3.68ct Sapphire & Diamond Engagement Ring australian Prior to 2006 it wasDATE: Art Deco, c. 1920 A gorgeous antique sapphire and diamond engagement ring dating from the Art Deco period, circa 1920. The principal stone is a 3. 68 carat asscher cut sapphire, with no indications of heat treatment. It displays a gorgeous deep blue colour and is complemented perfectly by two baguette cut diamond shoulder accents. It's crafted in platinum throughout and makes the perfect engagement ring. STONES Asscher Cut Sapphire Approx. 3.