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Lv 4
? asked in Science & MathematicsEarth Sciences & Geology · 1 decade ago

Which of the following pairs of rocks usually contains only one mineral?

1.- Rock gypsum and marble

2.- sandstone and conglomerate

3.- quartzite and schist

4.- dunite and gabbro

2 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    Gypsum and marble, just different forms of calcium carbonate (CaCO3). Gypsum is a chemical sedimentary rock, marble is the metamorphosed form the chemical precipitate limestone rock.

    Source(s): Geologist
  • veryconcerned_person
    Lv 5
    1 decade ago

    As an aside, gypsum is composed of hydrated calcium sulphate NOT calcium carbonate.

    Marble is composed of calcium carbonate.

    As the other answerer has stated, rock gypsum & marble both contain only one mineral, so it's 1.

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