Eye of Tiamat

From The Stargate Omnipedia

Eyeoftiamat.jpg

A circular crystal believed to be a weapon, possessed by the Goa'uld Marduk and was with him when he was sealed into his sarcophagus with a ravenous creature by his own priests.

It was recovered by the Russian archaeologist Alexander Britski who later killed himself rather than be eaten alive by the creature.

See also: Eye of Ra.

KEY EPISODES

The Tomb - The Eye of Tiamat is buried after Colonel Zukov defends himself and O'Neill from the resurrected Marduk.
Full Circle - Anubis uses the six collected Eyes for his new super weapon, which he uses to destroy a fleet of System Lord motherships -- and Abydos.
Fallen - The Eye of Tiamat is believed destroyed when the power core of Anubis's super-weapon overloads and explodes.