Which mineral scratches dolomite and is scratched by olivine?
1.galena
2.quartz
3.potassium feldspar
4.muscovite mica
10

Option (3)

Explanation:

The above-given question is based on the Mohr's hardness scale, which shows the hardness of the minerals ranging from 1 to 10, where the mineral with hardness 1 is Talc which is a soft mineral, and 10 is Diamond which is the hardest of all the minerals.

So from the above data, we can conclude that Potassium feldspar is the mineral which can scratch the surface of a Dolomite mineral and is scratched by Olivine, because its hardness (6-6.5) is more than Dolomite (3.5-4) but lesser than that of Olivine (6.5-7).

Thus, the correct answer is option (3).

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