What is the difference between different stone grades?

When buying stone, we usually hear "material A, material B, material C". What is the difference? In fact, this is a distinction between stone grades, not radioactivity.

Generally speaking, the same kind of granite stone can be divided into several grades according to the grade of stone blocks. For example, grey granite is divided into different grades such as A, B, C according to the source of the blocks. The quality and price of granite of the same species vary greatly between different grades. Therefore, the grading of stone is very important in the purchase of stone. The most effective way to distinguish different grades of stone is to compare. It is difficult to see the advantages and disadvantages of the same grade of stone alone, but it is easy to distinguish the advantages of different grades of stone together. Therefore, when you decide to buy a certain type of granite stone, check whether that type of granite stone is graded, and choose grades with fresher materials, brighter colors, and denser structures.

Let's take the flamed grey granite as an example. flamed grey granite slab is a very common decorative stone. In the industry, we classify them into A,B,C three categories according to whether the finished surface has color difference, whether there are dark spots, whether there are stone lines, whether there are defects, etc.

Among them, the A material is the best and the C material is the worst. In some places, more detailed classifications such as A,B,C,D,E will appear.

The flamed grey granite board of material A has no color difference, no dark spots, and no stone lines. The whole looks very neat and tidy. This kind of flamed board is more expensive and is usually used for dry hanging of indoor and outdoor walls.

There is no obvious color difference on the surface of the flamed grey granite board of material B, no big black spots, no too obvious white or blue stone lines. This kind of flamed board is also of good quality, and generally some projects with high quality requirements will choose Type B flamed board to be laid on the ground.

The surface of the flamed grey granite board of material C may have color difference, black spots, stone lines and other defects, but even the C type can guarantee no cracks and no surface damage, and the quality of use is the same as the A type. , It doesn't look as good as Class A,B. This type of board is often used in some parks, sidewalks and other projects with huge usage.

If you have any needs about grey granite or other stones like marble,quartz,limestone,etc. please contact us as follows.

Mr.Roger  

E-mail: xm@xiamensrs.com

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