Natural decorative natural stone is constructed of organic natural China Hand Carve Stone Tea Tray, so its quality depends upon the quality of the block and alternatively. Poor marble and granite slabs are primarily expressed in the following aspects:

(1) The design of the surface is not beautiful

The top of high-quality stone includes a beautiful and elegant color, making the decorative surface have a strong decorative effect. Nevertheless, the quality of the stone after processing is not beautiful, and it can not provide people a beautiful enjoyment. Therefore, the top tone of the rock is the primary indicator for evaluating the grade of the rock.

(2) The quality of the processed sheet is normally poor.

Stone will leave some defects on the top appearance during the processing. If these appearance problems are beyond the range of national standards, rock is a nonconforming item. With these poor quality stone with poor appearance, the overall effect will become very poor. Therefore, in judging the grade of the rock, furthermore to considering the color of the pattern, the appearance quality must also be checked.

(3) Large deviations in proportions

The decorative stone is processed right into a sheet, and is constructed with a tile or a collage method. If the dish with a large deviation of the specification size is definitely laid, the top will become uneven as well as the seams will be uneven. Especially for the adornment of the facade, the series form of the decorative surface will be irregular, that may affect the overall ornamental effect. Therefore, the deviation of the size of the specification will directly impact the ornamental aftereffect of the stone.

(4) Poor physical and chemical performance indicators

The inferior stone has poor compressive strength, flexural strength, wear resistance, durability, hardness, etc., and cannot guarantee the durability of the stone.