The Mineral Encyclopedia Gadget and curiosity as you solve

and curiosity as you solve a series of riddles and puzzles

making work easier to do

Length: 14 inches

Wind-up mechanism powers planetary orbits—no batteries needed

Features 22 experiments that demonstrate key concepts like forces

The Mineral Encyclopedia Gadget and curiosity as you solveMineral collecting by amateur "rockhounds" has never been more popular. Old quarries, road cuts, and exposed landscapes are being examined by new generations of minerals enthusiasts. Each needs a comprehensive guidebook with clear photographs and accurate data. This is it. In a thick but handy format, more than 700 different minerals and rocks are grouped by color (for ease of location in the book) blue, red, yellow, brown, green, white and black