Solitaire Tension Ring® by Niessing (No this isn't that *kind* of a ring. I want this for everyday wear.)
Niki Kavakonis | Cracked Ice II ring
Anel Slash - Antonio Bernardo
Niessing Solitaire Loop. »A curved band winds around the finger. Before the two ends can meet again, the band lifts off and floats freely away from the finger. There are two versions: "Curve" and "Counter-Curve".