Serenity Torbernite is a crystalline ore form of uranium, and can be found within uranium caves. They can be collected and sold for 40 000 E$ each.
Regeneration
These crystals will randomly form within uranium caves. They have a flat 50% chance to appear to begin with, with that chance decreasing the more crystals from that specific uranium cave that have entered your cargo bay (if they get detonated or lost to space before entering the bay, they do not count for the decreased chance.
These crystals are extremely volatile, and can undergo fission after experiencing even a small amount of thermal damage. Equipping a manipulator arm and disabling the autopilot is recommended to have the most likely chance of collecting without error.
A Serenity Torbernite crystal undergoing fission after touching a thruster's plume