Different Types of Rocks with Pictures

1. Igneous Rocks

These rocks are formed from melted rock inside the Earth deep.
Examples: Granite, Basalt, Pumice.

Granite is composed of quartz, alkali feldspar and plagioclase and it is used in countertops and tile floors.

Granite

Basalt is a rock formed from the rapid cooling of lava. It is used in construction.

Basalt

Pumice is a volcanic rock which has rough texture. It is widely used in cosmetic industry.

Pumice

2. Sedimentary Rocks

These rocks are formed from layers of sand, dead plants, slit and animal skeletons. Examples: Sandstone, Shale, Chalk.

Sandstone is a rock composed of sand-size grains of minerals. It is used in constructing temples.

Sandstone

Shale is a rock formed from the compaction of silt and clay-size mineral particles.

Shale

Chalk is a soft, porous rock form of limestone composed of the mineral calcite.

Chalk

3. Metamorphic rocks

These rocks are formed from other rocks, that are changed by heat and pressure. Examples : Slate, Marble, Schist.

Slate is a fine-grained rock composed of clay or volcanic ash. It is used for making tiles.

Slate

Marble is composed of recrystallized carbonate minerals like calcite or dolomite.

Marble

Schist rock is formed from mudstone and it is used for garden decoration.

Schist