Black ring

Black ring may refer to:


 * a ring with a black gemstone
 * black ring, a 5-dimensional solution, see higher-dimensional Einstein gravity
 * Black-ringed white-eye
 * Tomato black ring virus
 * the Black Ring, a magic ring from Conan the Adventurer
 * Black power ring of the Black Lantern Corps
 * the rings of power of the Nazgûl