These items can be embeded into gear to add their respective bonuses to the gear you add it to. Gems can't be embeded into all gear. Some can be embeded into Weapons, Gloves, Rings and Accesories and others can be embeded into Armor, Helms, Pauldrons, Greaves Belts and Boots. You can embed them by right clicking the gem and left clicking the desired gear. That will Embed Interface where you can select if you would like to use an Embed Charm to minimize the risk of failure, which will be displayed the Embed Interface. These items contain a Scorpio Starcore.