Moon Emerald

The Moon Emerald is an object that appear in the Sonic X comic series published by Archie Comics. It is a rare type of emerald that was stolen by the Rogue Rouge.

Description
The Moon Emerald is a large white emerald from space that is partially encased in a meteorite.

Archie Comics
The Moon Emerald was stolen from the Station Square Space Museum by the Rogue Rouge under orders from Eggman, which he later used along side the Master Emerald in order to power one of his robots.