Gemstone Heart

Gemstone Hearts, or gemstone hearts, (PROSE: A Copper-Colored Christmas Carol) were “the soul of a Clockwork Cherub's processing unit”; (PROSE: The Green Gorillas) one Cupid once stated that it was where a Clockwork Cherub's conscious thought came from, and what made them able to experience qualia. (PROSE: The Metafictional Meddler)

The Crew of the Copper-Colored Cupids allegedly controlled Gemstone Mines, from which they presumably mined the gemstones that became Gemstone Hearts. (PROSE: The Toymaker's Labyrinth)

The type of gem used could supposedly affect the Cherub's personality. For example, while most Cupids had rose quartzes for hearts, Amadeo-378 was rumoured to have a five-point diamond, allegedly accounting for his unusual intelligence and military prowess, (PROSE: The Green Gorillas) and Pessimist-242 apparently had a simple lump of coal for a heart, matching his dour personality. (PROSE: The Toymaker's Labyrinth)

Pythagoras-858 once explained to Lord Thymon that “our essence runs on more than just gemstones and positrons” when trying to make him understand how important the Cupid Homeworld itself was to the Crew. (PROSE: Magic Trick)

Philatel-426's gemstone heart “began to flutter” when he was first faced with Mailbag-431's ghost. (PROSE: A Copper-Colored Christmas Carol)