|Understanding the material an artifact is made of is crucial to fully
understanding the artifact. This book will help. First copyrighted in
1912, Dana's manual is a standard reference for identifying rocks.
Doesn't matter if they are diamonds or arrowheads. It uses simple,
condensed explanations in logical order, and is full of convenient,
brilliantly conceived charts for speedy reference. I was introduced to
this great book by a professional geologist. They may be purchased
at Amazon for under 5$. Mine is an 18th printing, hardcover and in
good shape. It sold for 1.98$! We can't always be certain our
identification of lithic material is correct, but a reference work such
as this can really help.