Art Deco Style Oval Sapphire Engagement Ring.  This modern engagement ring features a rich .65 carat cobalt blue sapphire in 18 karat white gold and a design inspired by the Art Deco period. The sapphire is sitting bead set in the center of a lovely navette shape that is outlined with milgrain detail. Accented by .16 carats of clean white diamonds, this ring has a great contrast against the beautiful sapphire. The ring has a classic look done with skillful modern craftsmanship.