GEOLOGY

Detailed explanation-1: -Hardness is which kind of property? Explanation: Hardness is an anisotropic property; a mineral may show different values in different directions.

Detailed explanation-2: -Hardness is just one mechanical measurement and properties such as toughness and strength need to be considered, as hard materials tend to have low toughness and can easily fracture. Hardness can be assessed by a number of techniques including indentation, scratch and rebound hardness measurements.

Detailed explanation-3: -Hardness. The ability to resist being scratched-or hardness-is one of the most useful properties for identifying minerals. Hardness is determined by the ability of one mineral to scratch another. Federick Mohs, a German mineralogist, produced a hardness scale (table 5) using a set of ten standard minerals.

Detailed explanation-4: -Color, luster, streak, hardness, cleavage, fracture, and crystal form are the most use-ful physical properties for identifying most minerals.

Detailed explanation-5: -Properties that help geologists identify a mineral in a rock are: color, hardness, luster, crystal forms, density, and cleavage. Crystal form, cleavage, and hardness are determined primarily by the crystal structure at the atomic level.