The mineral grains in such rocks can generally be identified with the naked eye.

The grit refers to the number of mineral grains that, when set end to end, equal 1 inch.

When magma cools the atoms and molecules rearrange to form mineral grains.

Rock forms when mineral grains (often crystals) grow together.

These salt crystals pry apart the mineral grains, leaving them vulnerable to other forms of weathering.

The oldest known mineral grains on Earth are approximately 4.4 billion years old.

Individual mineral grains from a rock sample may also be analyzed by X-ray diffraction when optical means are insufficient.

This would also help to increase rotation of elongate and tabular mineral grains.

Variations in chemical composition within a material (zoning), such as a mineral grain or metal, can be readily determined.

Most rocks are aggregates of small mineral grains.