Question

Quartz is found in which type of rock?

(a) Igneous rock

(b) Sedimentary rock

(c) Metamorphic rock

(d) Igneous, sedimentary and metamorphic rocks

This question was addressed to me at a job interview.

Query is from Formation and Descriptive Study of Minerals in section The Study of Minerals of Engineering Geology

Answer 1

Correct option is (d) Igneous, sedimentary and metamorphic rocks

The best I can explain: Quartz minerals are found in wide range of rocks. They are not restricted to any one kind of rock. They may be found in igneous or sedimentary or metamorphic rocks.