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what color is basalt

Dec 24, 2015

 What color is basalt? We would like to know what color is basalt, the first of which is clear what is basalt.

OKorder what color is basalt

     Basalt is a kind of basic volcanic rocks, gabbro or diabase and its chemical composition is similar to that of SiO2 content changes from 45% to 52%, the content of K2O+Na2O is the intrusive rock is slightly higher, CaO, Fe2O3+FeO, MgO content was slightly lower intrusive rocks. The main mineral composition of the base of feldspar and pyroxene, the secondary minerals are olivine, hornblende and biotite, rocks are dark, usually black, sometimes grayish green and dark purple. Waspatchy structure. Stomatal structure and almond structure generally.

The bulk density of basalt is 2.8 ~ 3.3g/cm3, the compression strength of the dense is very high, but it can be as high as 300MPa, sometimes higher. The durability of basalt is very high, and many joints, joints into Pentagon or hexagon, composed of columnar joints. It is not easy to pick up a large stone, which is common in the structure of the pores and almond, although the surface of the basalt is widely distributed, but it can be used as a decorative stone.

     Secondly, what color is basalt, familiar with the main elements of the basalt, it is easy for us to understand what color is basalt.

     The main ingredients of basalt is three silica, two aluminum oxide, iron oxide, calcium oxide, magnesium oxide (as well as a small amount of potassium oxide and sodium oxide), the silicon dioxide content most, accounted for about forty-five percent to fifty.

     What color is basalt

     basalt 's color, common black, black, brown or dark green. Because of its dense texture, it is more specific than the general granite, limestone, Sha Yan, shale are heavy. But also some basalt due to the porosity in particular, the weight will be reduced, even in the water can float. Therefore, the body weight of the porous basalt, called pumice".



     basalt according to their composition of different can be divided into basalt, Alkaline basalt, high alumina basalt structure.

     According to the structure of the different structure can be divided into the pores of basalt, almond shaped basalt, basaltic glass


     Filling mineral

According to the filling of different minerals can be divided into olive basalt, hypersthene basalt.

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