The sunstone is a key used to unlock Val-El's Fortress of Solitude. It features a modified version of the House El sigil.


Intercepting Seg-El in the street, Adam Strange gave Seg the sunstone. Seg later returned home, showing it to his parents. They offered to hold it for him, as the symbol was outlawed. He agreed, but instead stole it. Walking home late sometime later, a member of Sagitari searched Seg, finding the sunstone. He knocked them down, taking the sunstone. He was quickly found by his mother in a skimmer, which they used to travel to his grandfather's Fortress of Solitude. Arriving there, Seg used the sunstone to unlock the Fortress.[1]

Known users

Current users

Former users



  1. "Pilot". Krypton. Episode 1. Syfy.