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Question
Hardness of the stones can be tested by____ in the laboratory.
A.
Impact strength
B.
Abrasion strength
C.
Mohs scale
D.
Crushing strength
Answer ( Option C)

Mohs scale

Solution

Hardness is measured by moh's hardness in which the mineral substance of known variation in hardness are used to scratch the rock.
Abrasion test is used for hardness of aggregates
             Moh's Scale
   Mineral    Hardness
Talc 1
Gypsum 2
Calcite 3
Fluorite 4
Apatite 5
Orthoclase 6
Quartz 7
Topaz 8
Corundum 9
Diamond 10

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