Scimitar of Greed
An artifact of Mammon, destroyed by the party to strengthen Ivillios the Gold enough to allow Ivillios to take over Hell and drain Mammon of all of his remaining power. It was used by an ancient civilization in human sacrifices, and caused those it killed to become quartz crystals. At the time, those crystals were highly valuable, but supply and demand gradually reduced thei worth until the Scimitar became less useful. It was sealed in a Honduran pyramid that the party ransacked.