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Different Types of Rocks with Pictures

Amruta Joshi Oct 27, 2020
These rocks are formed from melted rock inside the Earth deep. Examples : Granite, Basalt, Pumice.
1. Igneous Rocks
Granite is composed of quartz, alkali feldspar and plagioclase and it is used in countertops and tile floors.
Basalt is a rock formed from the rapid cooling of lava. It is used in construction.
Pumice is a volcanic rock which has rough texture. It is widely used in cosmetic industry.
These rocks are formed from layers of sand, dead plants, slit and animal skeletons. Examples: Sandstone, Shale, Chalk.
2. Sedimentary Rocks
Sandstone is a rock composed of sand-size grains of minerals. It is used in constructing temples.
Shale is a rock formed from the compaction of silt and clay-size mineral particles.
Chalk is a soft, porous rock form of limestone composed of the mineral calcite.
These rocks are formed from other rocks, that are changed by heat and pressure. Examples : Slate, Marble, Schist.
3. Metamorphic rocks
Slate is a fine-grained rock composed of clay or volcanic ash. It is used for making tiles.
Marble is composed of recrystallized carbonate minerals like calcite or dolomite.
Schist rock is formed from mudstone and it is used for garden decoration.