On television, the Hand of Omega appears in one story: Remembrance of the Daleks.
The Hand resided in a casket that gave it a coffin-like appearance. The casket had a dull, bronze appearance to it, but what material it was actually made from is unknown.
The history of the Hand after its first use is unknown until its re-discovery by the Doctor. It was removed from Gallifrey by the First Doctor prior to his self-imposed exile (before the events of the first Doctor Who episode). He hid it in a funeral parlor on Earth.
The Doctor, in his seventh incarnation, returned to seemingly rescue the Hand from capture during the events of Remembrance of the Daleks. In truth, he had laid a trap for Davros and the Daleks. He tricked them into using the Hand on the sun of their home planet of Skaro. Davros had hoped to use the sun of Skaro as a power source for Dalek time travel, but instead the resulting supernova wiped out the planet and, presumably, the Daleks themselves. The Hand of Omega returned to Gallifrey afterward.The Hand on Television