a black opal

Object 'black opal' is type socket, material opal.
Extra flags: noremove nouncurse.
Weight is 0.5, value is 10, level is 50.
Armor only socket.
Adds following to extra flags: burnproof
Affects lightning bolt by 1.
Affects chain lightning by 1.
Affects ac by -10.
Affects savingaffl by -2.