Obtained: Random Loot Trophy off of Diamond Golems and Diamond Lords
Uses:
Carve it into a Singularity Keyring using lockpick skill with an Intricately Carved Tool
or
Use an Oil of Nullification on it to produce a Treated Diamond Heart (alchemy skill check) which can be carved with an Intricately Carved Tool (lockpick skill check) into an Isparian Weapons Modifying Tool which is used to remove elemental stones from Isparian Weapons.
or
It is one of the golem hearts requested in one of Captain Krank's Errands quest
or
Turn into a Stone Collector for 5,000 xp and 3 Diamond Scarabs
You give Pagrok the Stone Collector Diamond Heart.
Pagrok the Stone Collector tells you, "You're lucky to find one of these!"
You've earned 5,000 experience.
Pagrok the Stone Collector gives you 3 Diamond Scarabs.