Victory ring
From Smallville Wiki
"Your father's ring may symbolize victory back home, but here it means defeat." - Zor-El (to Clark) (Blue)
Jor-El's victory ring was made of a blue kryptonite that stripped Kryptonians of their powers while worn on Earth.
[edit] Early History
Kryptonians have no super powers under the red sun of Krypton, so the ring has no effect there. Jor-El was given his victory ring when he first became a member of the Kryptonian Council. Lara-El wore it around her neck on a necklace after Jor-El gave her the ring as a memento. Zor-El knew of the ring's mineral content and so made sure that when Lara would be resurrected on Earth, she had the ring; Zor-El knew she would give the ring to Clark, eliminating his powers.
[edit] Season Seven
When Clark placed the blue crystal inside the console at the Fortress of Solitude, Lara was reborn as a replicant with all the memories she had from life on Krypton. She was also fully clothed, and wearing the victory ring around her neck.
When Lara spoke with Clark at Queen Tower, she gave him the victory ring, telling Clark that it was a Kryptonian tradition to pass the victory ring onto the first born son when he came of age. Clark put it on, and his eyes burned blue as the ring stripped him of his Kryptonian powers. The ring had been a trap set by Zor-El, to strip Clark of his powers.
The ring was seemingly impossible to take off; Clark was unable to take the ring off and regain his powers. To defeat Zor-El, he was forced to destroy the blue crystal itself. This removed the victory ring and destroyed Zor-El's replicant, but it also caused Lara-El's replicant to disappear.
