1.5 Carat Solitaire Diamond Art Deco Engagement Ring1. 5 Carat Solitaire Diamond Art Deco Engagement Ring. This stunning two toned Art Deco solitaire diamond engagement ring features a fabulous 1. 5 carat Round Brilliant Cut diamond in the antique setting. The squared off shoulders feature wonderful engraving on the shoulders which lead up to the very open basket that lets plenty of light into the gorgeous center stone. The basket of this ring is done in 14 karat white gold which enhances the whiteness