Question : As per the Mohs Scale, which among the following minerals is harder than Apatite?
Option 1: Calcite
Option 2: Gypsum
Option 3: Orthoclase
Option 4: Fluorite
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Correct Answer: Orthoclase
Solution : The correct answer is Orthoclase .
The ability of a substance to withstand scratches is known as its hardness. Mohs hardness test measures it by using known-to-be-variable mineral compounds to scrape rock. According to the Mohs hardness scale, Orthoclase is harder than Apatite. One of the tectosilicate minerals that create igneous rock is Orthoclase.
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