A full model of the mechanism of thunderegg formation with site information for the western U.S.

Detailed classification and photographs and models of formation of geodes and their structures and inclusions.

"Learn from two world renowned gemologists as they share their lifelong passion and knowledge of everything geodes, from their formation and occurrence to the amazing variety and beauty of these popular, world-class gemstones"--Back cover

In the early seventies, some of us were shot like stars from our parents' homes. This was an act of nature, bigger than ourselves. In the austere beauty and natural reality of Hell's Canyon of Eastern Oregon, one hundred miles from pavement, Pam, unable to identify with her parent's world and looking for deeper pathways has a chance encounter with returning Vietnam warrior Skip Royes. Skip, looking for a bridge from survival back to connection, introduces Pam to the vanishing culture of the wandering shepherd and together they embark on a four–year sojourn into the wilderness. From the back of a horse, Pam leads her packstring of readers from overlook to water crossing, down trails two thousand years old, and from the vantages she chooses for us, we feel the edges of our own experiences. It is a memoir of falling in love with a place and a man and the price extracted for that love. Written with deep lyricism, Temperance Creek is a work of haunting beauty, fresh and irreverent and rooted in the grit and pleasure of daily life. This is Pam's story, but the courage and truth in the telling is part of our human experience. Seen through a slower more primary mirror, one not so crowded with objectivity, Pam's memoir, is a kind of home–coming, a family reunion for shooting stars.

The rapid growth of gemological sciences and mineralogy demands a dictionary such as this for gemologists, mineralogists, geologists, jewel dealers, industry and hobbyists. With some 16,000 comprehensive definitions, supplemented by more than 250 diagrams and figures, this is a one-stop reference to any matter dealing with gems and gemology.