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Granite Stone

Granite Stone


Granite is igneous rock, in the most common cooling magma in the earth’s crust condenses into crystalline rock deep in the earth’s crust, its main ingredient is quartz, feldspar and mica. General is yellow and pink and gray. Texture hard, color and beautiful, and it is a very good building materials. Known as the granite.

Formation Process of Granite

Granite is a volcanic eruption of lava and under considerable pressure in the molten state tectonic uplift to the surface crust of rock. In the surface crust formation, moving slowly cooled down. Are igneous the kind of igneous rock is silicate (Silicate) the melt is cooled and solidified magma or lava crystallization of a substance. When the molten magma condensation consolidation, the mineral that is formed in igneous rocks, such as olivine, pyroxene and the like. Its maximum density of iron magnesium silicate mineral, formed when the highest temperature in the magma; less dense minerals such as feldspar and quartz, formed in the late cooling. Minerals formed in the lava, you can usually grow without restraint, and a well-developed crystal.

Granite evaluation methods

There are four granite quality evaluation indicators:

  • Decorative properties, that is, color and pattern;
  • Timber properties. Including finished product rate and the desolation rate;
  • Processing performance, including sawing nature, polishing and polishing;
  • Use of performance, and refers to the physical performance indicators, including body weight, compressive strength, flexural strength, acid resistance, alkali resistance, radioactive, hardness and water absorption.

As a stone, first have a good decoration, that is to have smooth and brilliant color and pattern; finished second possibility requires high energy extraction, processing a large number of large blocks and slabs; Section three required processing performance is good, with good can be cut, polished and polishing; fourth requires the use of performance, rugged durability, easy to change color, has a compressive, flexural, antifreeze and water less advantages.

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