Any Yurman ring is a great gift, but the Black Diamond Crossover Ring is a particularly good choice, blending Yurman's iconic twists with more than enough bling to grab her attention. Even better ...

David Yurman black onyx signet ring, $495, buy now at David Yurman. Stephen Webster x Thames "Queens Walk" ring, $1,800, buy now at Stephen Webster. Foundwell turquoise ring, $565, buy now at Mr ...