Author : Dan Green
It tells you about many important minerals and rocks and at the bottom of the page it should rate it on how hard it is on Moh’s scale. At the back of the book it should have a fold-able poster that shows talc being a level 1 and a diamond being a 10.
col : 552 Gre
Extra information : I would rate this book 4 out of 5 stars and a good website to talk about or by these books would be (dangreenbooks.com).