Author

Geological Survey

2 free books by Geological Survey, free to read online. Chapter 1 of any book is free, no account needed.

Writes aboutYellowstone National Park Precious stones -- United States Precious stones -- Collection and preservation -- United States Hayden, F. V. (Ferdinand Vandeveer), 1829-1887 Gems -- United States

Cover of Natural Gemstones

Natural Gemstones

Geological Survey

Cover of Ferdinand Vandiveer Hayden and the Founding of the Yellowstone National Park

Ferdinand Vandiveer Hayden and the Founding of the Yellowstone National Park

Geological Survey