Here are some of the timeless engagement rings that will be treasured forever exactly like the women who have worn them. 1 ... carat oval blue sapphire ring which is surrounded by 14 solitaire ...

Vintage signed pieces by names ... two other colored gems that are set on rings, too, including a 1.38-carat fancy vivid purplish pink diamond (estimate: $425,000 to $560,000) and a 2.65-carat ...