Blue Gemstone

 is an accessory in. It can be equipped by Lucca, Robo or Magus. When equipped and with all three in the party, they can perform the Triple Tech, Omega Flare.
 * Found at: Giant's Claw at 600AD.
 * To obtain it: Find Toma's skeleton and open the mouth. After you fall down head to the bottom of the room and flip the switch. Go down the ladder to pick up the Blue Rock.

Name Origin
This gemstone is blue, likely resembling or.