Although manufacturers admit granite contains uranium and other radioactive materials such as thorium and potassium which decay over time and release radon gas they attest that the amount of radioactive material in countertops is so puny they don t pose any health risks source.
What is granite made out.
Granite comes out of quarry but how they make those granite slabs for your countertops.
First granite is made of large mineral grains its name is latin for granum or grain that fit tightly together.
Its beauty comes from specks of glass or metal embedded in the stone to give it a granite like appearance.
Granite is an intrusive igneous rock which means it was formed in place during the cooling of molten rock.
It is phaneritic meaning its individual grains are large enough to distinguish with the human eye.
Here s how its made.
Granite coarse or medium grained intrusive igneous rock that is rich in quartz and feldspar.
Granite contains several minerals of which quartz feldspar and mica are the three main components.
Learn more about the properties and uses of granite in this article.
Strictly speaking granite is an igneous rock with between 20 and 60 quartz by volume and at least 35 of the total feldspar consisting of alkali feldspar although commonly the term granite is used to refer to a wider range of coarse grained igneous rocks containing quartz and feldspar.
However in the dimension stone trade the word granite is used for any feldspar bearing rock with interlocking crystals that are large enough to be seen with the unaided eye.
It is the most common plutonic rock of the earth s crust forming by the cooling of magma silicate melt at depth.
A geologist might define granite as a coarse grained quartz and feldspar bearing igneous rock that is made up entirely of crystals.
Formally granite is a plutonic rock that is composed of between 10 to 50 quartz typically semi transparent white and 65 to 90 total feldspar typically a pinkish or white hue.
This material stands up to stains scratches and heat and as a bonus it doesn t require sealing.
The granite is called an igneous rock derived from a latin word ignis meaning fire.
The geologic process that occurs to create granite happens slowly over time.