Picture (A) is the metamorphic rock (B) is the igneous rock and (C) is the sedimentary rock
What is Rock ?
Mineral grains that have grown or gotten cemented together to form a solid mass are called rocks. It depends on the rock; some are big, some are little. The word "pebble" refers to little rocks. At least one mineral can be found in every rock. According to their formation, geologists categorise rocks.
Sedimentary, igneous, and metamorphic rocks are the three major categories of rocks. Each of these rocks is the result of physical processes that are a part of the rock cycle, such as melting, cooling, erosion, compacting, or deformation.
Rocks and minerals are used by humans for a variety of purposes, such as construction, cosmetics, transportation, and infrastructure. Humans must regularly ingest minerals in order to sustain a healthy lifestyle and build their bodies.