With the continuous development and progress of society, we have become increasingly demanding the use of stone. From the simple arc plate cylinder to a variety of shapes, from the the ordi

  Natural marble dense texture, hardness, easy processing, carved and polished, polishing. Marble polished smooth and delicate, natural and smooth texture, has a high decorative. Marble small

Stone industry Test Standard--- Two 

prEN 12867-1997　　

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Stone industry test standard One

NF B10-625-2003 

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1. Sandstone Introduction
Sandstone (also known as sand rock) is a sedimentary rock named by sand constitute its main ingredient is SI20, Al20 in nature is the result of geological changes in the sea to the deposition and the land to the deposition, the original accumulation of a large number of sand layer terrain masked by geological changes in the process of heating and pressurizing is formed.
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