1910 French Rose Cut Diamond and Lab-Grown Sapphire Ring, Platinum, 18K (sold) This ring has a spectacular sapphire, which while chemically and visually identical to a natural sapphire, did not grow in the ground. Rather, it more than likely grew in a furnace belonging to a Frenchman named Auguste Verneuil— a chemist who invented a process for making synthetic sapphires in 1902.
1920s Art Deco 1.38ct European Cut Diamond (G/H SI1) RingPlatinum Filigree, Single Cut Diamonds, $11750 Quite a spectacular ring. One of my favorite, but rare to find, features of Art Deco engagement rings are diamond-set prongs. If you look closely, each of the four corner prongs is punctuated with a little single cut diamond.