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________ is a metamorphic rock which is hard, brother, crystalline and compact in nature.

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________ is a metamorphic rock which is hard, brother, crystalline and compact in nature.

(a) Quartzite

(b) Sandstone

(c) Slate

(d) Kankar

I had been asked this question in an interview.

I need to ask this question from Common Building Stones of India topic in section Stone and Brick Masonry of Construction & Building Materials

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Right option is (a) Quartzite

Best explanation: Quartzite is hard and hence it is difficult to walk and dress. It is used in retaining walls, Road metals, concrete aggregate, pitching, rubble masonry, facing of buildings, etc. It is mostly found in Bengal, Himachal Pradesh, Uttar Pradesh, Gujarat, Punjab and Rajasthan.

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