Writers : Khoi,Naser
Refference : Geosciences Scientific Quarterly Journal,No.:4,P.:64

Abstract :
a complex physical characteristics of the minerals, does not have a comprehensive definition The word Used for its nomination does not contain various aspects. Though, both on the field and in the laboratory! it can be used as a useful proper in mineral identification; but it can not be used as a decisive one. Its application can be limited by the mineral grain size. In this report, attempt has been done to mention the limitations and difficulties of hardness.
Subject List : Hardness