From Top: Art Deco platinum diamond engagement ring, $3,995. Art Deco 18k white gold ring with cushion cut tanzanite and accent diamonds, $1,895. Edwardian 14k yellow gold diamond solitaire ring with ornate filigree setting, $2,495. Art Deco platinum and 18k yellow gold alternative engagement ring with round faceted sapphire and accent diamonds, $2,495. Edwardian white gold diamond solitaire engagement ring with intricately engraved setting, $3,995. Vintage 14k yellow gold diamond eternity band, $1,895. All available at Arcadian Antiques, Nickels Arcade, Ann Arbor; 734-994-3433; arcadianantiques.shop.