Granite - How to identify stone quality is good or bad

- How to identify the stone quality granite formed from volcanic rock, stone material is a kind of steel the lens, initially formed from feldspar, quartz, solid surface, and mixed with one or more of the black minerals, in the order of the structure are flat. is mainly made of quartz, feldspar and mica. The color depends on the amount and type of contained components. crystalline structure for the whole rock and high quality granite grain fine and homogeneous, structure compact, more content of quartz, feldspar shine bright. of silicon dioxide content is higher, belongs to the acid rock. Some solid surface contain traces of radioactive elements, this kind of granite should be avoided for indoor. structure compact, hard, good acid and alkali resistance, weather resistance, can be in outdoor use for a long time. Processed products facing stone material, its quality can be identified from the following four aspects: a view, namely the macroscopic observation of stone material surface structure. In general the stone material of uniform fine structure has exquisite texture, is the best of stone; Coarse grained granite decoration and differ the stone material of a structure its exterior effect is poorer, mechanical performance is uneven, the quality is a bit poor. Also due to the influence of geological processes in natural stone material, in which often produce some fine veins and microcracks, stone material the most easily along these place fracture, should be paid attention to. As for the lack of edge horn is less affect beautiful, especially when the choice should be paid attention to. Second, namely the stone size specifications. So as not to affect after mosaics of splicing or cause pattern, decorative pattern, line deformation, affect adornment effect. Sounds of stone material knock three, namely. Generally good quality, internal dense homogeneous and no microscopic fissure of stone material, the knocking sound is ringing pleasing to the ear; Instead if the stone is internal microscopic cracks or thin veins, or become loose contact between particles, as a result of weathering, beat cracking. Four test, which is a simple test method to verify stone material quality. Usually at the back of the stone on drop a few drops of ink, such as ink one soon, it indicates that the internal loose or granular stone microscopic cracks, stone material quality is bad. Conversely that stone material density, quality of a material is good. Sheet in the finished product selection, due to the stone material is natural, cannot be exactly the same texture, in mining processing technology level also have difference. Most of the stone is hierarchical. stone no chromatic stripe, most only color spots, also have a plenty of pure color. The mineral grains as fine as possible.
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