Diamond Powder
Obtained: Random Loot Trophy off of Diamond Golems and Diamond Lords
Uses:
Use the Diamond Powder on a Decanter of Essence to produce a Diamond Oil (alchemy skill check involved) that can be used on a Pyreal Ingot to produce a Diamond Infused Ingot (another alchemy skill check). Diamond Infused ingots are used to obtain Isparian Weapons.
or
Turn into an Agent of the Arcanum for a Writ of Refuge
You give Agent Dravos Diamond Powder.
Agent Dravos tells you, "A rare find! My congratulations. Here is your Writ of Refuge. The Empyrean have left many secrets for us to puzzle out. Their geomancy recently became transparent to us. This powder might reveal yet another crucial part of their power. We shall crush the enemy through their own devices!"
Agent Dravos gives you Writ of Refuge.