Granite is a wonderfully durable and decorative stone. It is probably the world’s best known igneous rock. Among its many uses are to finish countertops, accent window sills, overlay tabletops, and add an artistic tone to fireplace areas. If you want that distinctive touch in your home or business, you’ll want to look for granite countertops Milwaukee WI .
How Does Granite Form?
The distinctive light color and coarse texture of granite is caused by the way it forms. All granite was once molten magma that cooled slowly into solid rock deep within the earth. During slow cooling, different minerals crystallized at different times from the magma by the process of “fractional crystallization“. The principal mineral types in granite include feldspars (plagioclase and orthoclase), quartz, and mica. The feldspars are pink (orthoclase) and white (plagioclase). The quartz is generally a glassy dark gray. And the micas are usually, but not always, black. It is this mixture of mineral colors that give granite its beautiful look.
Types of Granite
There are numerous colors and textural varieties of granite. Most pink granite contains a large amount of pink orthoclase feldspar. White granites contain less orthoclase and more white plagioclase. In addition to mineralogical variations, granite can also display different rock textures. All granites contain minerals that are visible to the naked eye. In some cases, one mineral type, generally the feldspars, grows larger in size than the others, giving rise to “porphyritic” texture. In some rare granites, the minerals form oval-shaped masses, giving rise to “orbicular granite“.
All these types of granite can be used in building applications. With its clean natural look, strength, and durability, granite is a material of choice in many homes and businesses. Indeed, it was often used in classic yesteryear building applications just as much or even more than today.