Vintage Art Deco 1.00 Carat Diamond Engagement Ring in Platinum.  This vintage Art Deco engagement ring features a 1.05 carat diamond set in shimmering platinum. The primary diamond has a very light yellow hue and sparkles with impressive brilliance. The main diamond is also accented by two .015 carat diamonds on the shoulders of the ring. The mounting has a boxy shape, holding the center diamond with platinum surface prongs. The shank of the ring features engraved Art Deco stylings that blend into the beautiful basket mounting of the center stone.