"A guide to Northern Californias best rockhounding sites, ranging from popular and commercial sites to lesser-known areas. Features an overview of the states geologic history as well as a site-by-site guide to the best rockhounding locations. An ideal resource for rockhounds of all ages and experience levels"-- Provided by publisher."Explore the mineral-rich region of Northern California with Rockhounding Northern California and unearth the states best rockhounding sites, ranging from popular and commercial sites to numerous lesser-known areas. Featuring an overview of the states geologic history as well as a site-by-site guide to the best rockhounding locations, Rockhounding Northern California is the ideal resource for rockhounds of all ages and experience levels"-- Provided by publisher.