Uncut Onyx are used to make the Amulet of Fury. The only monsters that drop Uncut Onyx is the tz-haar NPC's at the TzHaar teleport. To make an amulet of fury you need to Cut the Onyx, Have a gold bar, and 1 Ball of Wool and the Amulet mould. Add the Ball of Wool to the Onyx Amulet and you have yourself an Amulet of Fury

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