How much does 1 gram of californium?

In 1999, the Nuclear Regulatory Commission was charging $60 per microgram for californium. And that, my friends, is all the californium you will ever need. You could multiply this out to get the price per pound (it's in the billions of dollars) but that's kinda futile since they haven't made a whole pound of it and, considering that it's made in milligram quantities, they probably never will make a pound of it.

There are some cool things you can do with californium - they sell these little soil density testing machines to civil engineers who use them to determine if the ground is hard enough to build on, it's used in oil production, and things like that. Those instruments only have a microgram of californium in them, and you must be licensed with the NRC before you can buy the machine.