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Granite

Granite is an igneous rock with grains large enough to be seen with the naked eye. It is light-colored and formed from the slow crystallization of magma below the Earth's surface. It is made up mainly of quartz and feldspar. There are also minor amounts of mica, amphiboles, and other minerals.


Granite Facts:


Granite is the oldest igneous rock in the world, believed to have been formed as long as 300 million years ago, igneous rocks are formed from cooling lava or magma.

Granite is also what’s called a “plutonic” rock, meaning that it forms deep underground. Granite is the main component that makes up Earth’s continental crust.

The white mineral grains that you see in granite are feldspar, which is the most abundant rock on the planet, comprising around 60% of the earth’s surface.

The word “granite” comes from the Latin word “granum,” which means “a coarse grain.” Granite got its name because of the grain-like patterns formed by its densely packed crystals.

Granite has a density of around 162 pounds per cubic foot. That’s more than two times heavier than the same volume of water.

Granite is one of the hardest substances in the world, second only to diamonds. In fact, granite is so tough and durable that the pedestal that the Statue of Liberty stands on is made from granite.

The Statue of Liberty isn’t the only monument to incorporate granite. Granite has been used in construction since the Ancient Egyptians.

Granite was also the reason for the first commercial railroad in the United States—the “Granite Railway” of Quincy, MA.

Blue Hone granite, taken from the island of Ailsa Craig, near Scotland, is used in the manufacture of curling stones—those odd stone discs with handles used in the sport of curling.

The highest granite mountain in the world is Kangchenjunga in the Himalayas. At 8,586 meters, Kangchenjunga is the third-highest mountain in the world, behind Everest (which is limestone) and K2 (which is gneiss). Mount Rushmore is also sculpted out of granite.