Synthetic Heart

Synthetic Heart is a item and one of the items required to obtain the Sapphire Crystal.

Obtaining
A Synthetic Heart can be obtained from s in the. It has a drop chance from  Automatons, and a  drop chance from  Automatons.

A Synthetic Heart can also be found as an drop from treasure chests within the Precursor Remnants. It has a chance to roll as a drop in common loot chests, and a  chance to roll as a drop in rare loot chests.

Sapphire Gemstone Crystal
Bringing a Synthetic Heart and the other Automaton components to  in the  rewards the player with the Sapphire Crystal.

Forging
Synthetic Heart can be used to forge a Perfectly-Cut Fuel Tank once the player has reached. It takes days and  hours to forge.

Trivia

 * The Synthetic Heart is most likely based off the Centurion Dynamo Core from The Elder Scrolls V: Skyrim.