There are many types of natural stone according to the factors of its generation, and the most common classification is to divide stone into four categories: sandstone, slate, marble and granite.

1. Sandstone:

The sandstone is a sedimentary rock, the stone is coarse and loose, and it may be loose and deformed when it is damp; However, because it has a unique concave and rough texture, it is closer to the rough and natural feeling in the mountains and forests, so it is more often used in wall decoration.

2. Slate

Slate is a kind of metamorphic rock with a plate-like structure and basically no recrystallization, and the original rock is argillaceous, silty or neutral tuff, which can be peeled into thin sections along the slab direction. The color of the slate varies with the impurities it contains, and the iron-containing ones are red or yellow; carbonaceous ones are black or gray; Calcium-containing hydrochloric acid will bubble, so it is generally named and classified according to its color, such as green slate, black slate, calcareous slate, etc.

Slate can be used as a building material and decorative material, and in ancient times it was often used as tiles in areas where slate was abundant. Slate generally does not contain minerals.

3. Marble:

Marble belongs to carbonate metamorphic rocks, which were originally limestone from the bottom of the sea, which were slowly deposited and crystallized to become limestone; When the formation shakes and is subjected to high pressure and high temperature, the more significant is the enlargement and hardening of the crystal, forming the so-called marble. Due to the uneven impurities contained in its texture, and the stratum movement forms a more lively large-scale totemic change feeling, forming a natural marble pattern like a landscape. The normal service life is 150 years.

4. Granite:

Granite is a kind of igneous magmatic rock, which is due to the weathering of rocks and sand on the surface of the stratum, slowly moving to the deep trenches of the seabed, moving the earth's crust again and again, and slowly swallowing them to the center of the earth and being melted by ultra-high temperatures. Because the magma is less dense than the surrounding rocks, it is gradually pushed upwards and cooled to form new 3-D crystals (igneous rocks). Because it is a 3-D crystal, its texture is small, the pattern has a three-dimensional and crystalline feeling, and even some granite will exude a dazzling luster under the light. Its main components are feldspar, quartz and mica, etc., and the ordinary durability is 200 years.

In terms of other characteristics, marble is limestone, which has a lower hardness than granite and is not resistant to acid erosion, so it is not suitable for outdoor use, and is easy to deform and corrode under the washing of sunlight and rain. Granite, on the other hand, has high hardness and is resistant to acids and alkalis, so most of them are laid outdoors or in public spaces with frequent visits.

To sum up, the general home indoor stone selection is mainly marble, in addition to the price is cheaper than granite, its fine organization, polishing, variety, more patterns, color selection space and other characteristics are important factors loved by consumers and interior designers.