Dendrites are one of the qualities often seen in Montana agates, along with banding and unique colors, which is part of what makes Montana agates unique — the presence of most if not all of the characteristics common in agates in other parts of the world.

In this book, by respected agate expert Tom Harmon, featuring stunning photographs by Thomas P. Shearer, the story of the formation of agates and exploration of the various types of dendrites is the focus. Among the topics discussed is one of the rare properties of Montana agate, rainbow iris.

High quality gloss paper, full-color photos and 86 pages.