Californium is the 12th mineral you will mine. It was introduced in patch V0.25. It is used for producing income and upgrading your drill (as seen in Drill and Blueprints) Californium sells for $100,000 / unit. Unlocks at depth 306. Retrieved from "https://mrmine.fandom.com/wiki/Californium?oldid=9628" Categories: Mineral Minerals Community content is available under CC-BY-SA unless otherwise noted.