What Is Black Granite Made Of

However it s important to note that some stones marketed as black granite are in fact likely gabbro as granite must contain at least 20 quartz within a rock to make it granite. If you have a polished finish light can bring out the subtle metallic flecks that may be present in the stone. The most common accessory minerals are the black mica biotite and the black amphibole hornblende.

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The number and size of the golden and silver flecks are different in different blocks.

What is black granite made of.

The quartz and feldspar generally give granite a light color ranging from pinkish to white. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. The quality of this granite depends on the size number and distribution of the golden flecks in the slab or tile. Black galaxy granite is black colored granite containing small golden and silver specks in the background.

That light background color is punctuated by the darker accessory minerals. Various mineral inclusions give different colors to granite. Thus classic granite has a salt and pepper look. Two popular examples are black galaxy and absolute black neither of which contain enough quartz to qualify.

The stone known as black granite is usually gabbro which has a completely different chemical composition. Granite can also be dark gray or black. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral. It was first discovered in the late 1970 s or early 1980 s.

Flecks of darker minerals appear throughout granite giving it color variations. It is also known as star galaxy. In order for a stone to technically qualify as granite it must be made up of at least 20 quartz a white to milky colored stone. No artificial or temporary color agents or finishing materials are used to achieve its natural black color.

Depending on the style and finish of black granite you choose the lighting in your room can make a big impact. It has since become an incredibly popular material all around the world because of its durability and striking visual beauty the deep black of the stone highlighted with naturally occurring gold colored flecks work well with a number of design. Black galaxy granite is a relatively new addition to the family of building materials. Granite has been extensively used as a dimension stone and as flooring tiles in public and commercial buildings and monuments.

It forms from the slow crystallization of magma below earth s surface. Cambrian black granite is the only solid black granite quarried in north america. This coarse grained stone with a natural sparkle comes from one of our company owned and operated quarries in canada. Black granite countertops prices.

For example granite gets it red color from the inclusions of hematite oxide of iron and it gets green color with inclusions of potassium into the feldspar. Black granite is highly popular and prices vary based on the particular type of slab.

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