15-20 mm Black Galaxy Granite, For Flooring

Granite is a rock. This means it is made up of several minerals, including quartz, feldspar and plagioclase. It is an igneous rock, which means that it was formed of the magma deep within the earth.
This makes granite very hard and durable. Granite, like quartz, can come in many colors. It can even resemble marble, with veins and clouds.