Digging for Amethyst:

Take self-guided or guided tours at the Amethyst Mine Panorama. We offer our visitors a one-of-a-kind experience, the adventure of hunting for your own amethyst. You’ll dig for your own amethyst and are able to purchase what you find for only $4.00 per pound.
Admission fees are $10.00 per person and children under 5 years of age enter for free.

http://www.amethystmine.com/amethyst-digging/