Grey slate pave stone 15-30mm thick 60x30cm China quarry sale lowest price

Slate is a sedimentary rock, and its formation is the same as sand and stone. The main component is silica. Its characteristics can be acid resistant. According to the composition of slate, slate can be divided into three types.

Carbonate type Slate: the content of silicon dioxide is less than 40%, the content of two aluminum is less than 10%, the content of calcium oxide is less than 15%, the content of Magnesium Oxide is less than 10%, and the content of ferric oxide is 3% - 7%.

Clay type Slate: its main components are sericite, illite, chlorite, kaolin and other clay minerals. They account for more than 80% of the mineral composition of the slate, the content of silica is more than 50%, the content of three oxidation two aluminum is greater than 12%, the content of calcium oxide is less than 10%, the content of Magnesium Oxide is less than 5%, and the content of ferric oxide is high. In carbonate type slate.

Carbonaceous and siliceous Slate: mineral composition is between clay type slate and carbonate type slate. Because of the high degree of silicification, high silica content, the stone is very hard and the color is deep.

The structure of the slate is flaky or lumpy, with fine particles. The grain size is usually cryptocrystalline between 0.9 and 0.001mm. Most of them are dense, and most of them are aligned. The rock cleavage is well developed, the hardness is moderate, and the water absorption is small. The life span is usually about 100 years.

The color of the slate is mostly monochromatic. Such as: gray, yellow, green, gray, green, cyan, black, brown red, red, purple and so on. Because a single color pure, in the decoration, gives people a sense of elegant. Slate is no longer polished, showing natural form, forming a natural sense of beauty.

Because of its climate and pollution resistance, the slate is often used in various residential and commercial landscaping projects. It is often used to lay the path and decorate the swimming pool, including the exterior wall, and even the courtyard. Slate stone can also be used as a fountain, combining traditional and modern styles.