Aurum

The Aurum was a human space station which orbited Voga. It was made of gold and shaped like a pyramid, with Oberon Fix living at the top.

The Cyber-Leader launched an attack on the Aurum to keep Fix from using the Golden Pulse to make the Cybermen vulnerable to gold and to kill them. The pulse was activated by Nelvin and boosted by the Eighth Doctor, causing the Aurum and all gold within range to become sub-space particles and wipe out the Cybermen. (AUDIO: The Great Cyber-War)