Granite - one of the most beautiful views of a stone, used for decoration of the house and adjoining to it territories. It is very steady breed which is formed in the depths of Earth. The players of granite can be changed a little depending on the field.
Physicomechanical properties of granite
Granite consists of four minerals: quartz, mica, horn blende and feldspar. This breed is formed in the depths of Earth, and then slowly cooled and condensed. Because of slow cooling the crystals of all four minerals can grow to the sizes, well distinguishable a human eye. So, for example, it is possible to notice easily in structure of granite of a congestion of black mica and brilliant crystals of quartz.
Depending on the field color and composition of granite can differ. Its color varies from rose-red to dark-gray. Such wide range of shades depends on amount of impurity which meet in different points of the globe. Granite has amazing hardness. Among natural stones on the hardness it concedes only to diamond (6 against 10 on the international scale of hardness). Granite cannot almost be destroyed without the special equipment.
Toxicity of granite
Disputes on toxicity of granite were conducted long. Scientists came to a conclusion that after all it is not toxic and in this sense is not capable to do harm to a human body. By the nature granite radiates radiation. However the radiation background which is created by this breed is negligible. Its value much less a natural radiation background that is provided with secondary space beams.
Granite as construction material
As construction material granite began to be used in an extreme antiquity. The palaces built of this stone in immemorial times look almost new also today. Granite - chemically inert material because of low porosity and magmatic origin. He does not react with acids, alkalis and is absolutely irresponsive to weather whims. The granite covering does not demand leaving. It is often used for production of kitchen table-tops. Today the polished granite plates are in demand. They are processed by means of a diamond crumb - only the firmest stone can cope with granite. Such plates are externally very beautiful and they cannot almost be bent. They do not demand special leaving. Granite has only one shortcoming - the high price which is connected with its unique properties (hardness, chemical inertness) and also with difficulties of production and processing. He lies down deeply underground, and process of production consumes a lot of electric energy.