Question

What are rock forming minerals?

Answer 1

Scientists have identified over 4,000 different minerals . A small group of these minerals make up almost 90% of the rocks of Earth’s crust. These minerals are known as the common rock-forming minerals.

To be considered a common rock-forming mineral, a mineral must: A) be one of the most abundant minerals in Earth’s crust; B) be one of the original minerals present at the time of a crustal rock’s formation; and, C) be an important mineral in determining a rock’s classification.

The six minerals olivine, quartz, feldspar, mica, pyroxene and amphibole are the commonest rock-forming minerals and are used as important tools in classifying rocks, particularly igneous rocks. Except for quartz, all the minerals listed are actually mineral groups.

Answer 2

The six minerals olivine quartz feldspar ,mica,pyroxene and amphibole are the commonest Rock Foming Minerals and are usedas important tools.
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