In Oregon there are a number of places where you can find and dig or buy pretty minerals. Over at Mitchell in Eastern Oregon in the Painted Hills area there is a place where for a nominal fee you are issued a bucket and pick and an area to dig in- whatever you find is yours.

My favorite place is in Central Oregon, and danged if I haven't forgotten its name. It is in the Terrebonne area, not far from Smith Rock (a premium rock climb for the hardy from all over the world), also not too far from Prineville. It is "something, something" Rock Garden, a place where in addition to the building where they have all these marvelous rocks, they also turn on black light where you can see all the different colors and shades that individual minerals emit, they also have pools and ponds shaded by large trees where ducks and geese and peacocks swim and strut, followed by their babies.

Neat place.

Ah ha! I have remembered: it is "Peterson's Rock Garden".