The only natural stones harder than granite are diamonds, rubies, and sapphires. Granite is an igneous rock which forms from the slow crystallization of magma below Earth's surface. Granite is composed mainly of quartzand feldspar with minor amounts of mica, amphiboles, and other minerals. Truly a natural stone, meaning each slab is truly unique. It is highly heat, scratch and stain resistant, and is commonly used to face commercial and institutional buildings and monuments. Granite is the traditional favorite of countertop materials for its unique colors and patterns, proven durability and lasting value. Granite comes in hundreds of different colors and is quarried in countries around the world.