Classification of natural stone and characteristics of stone products

Natural stone according to its generation factor and derivation numerous kinds, more general classification is stone divides into sandstone, SLATE, marble and granite four big kinds. 1. Sandstone The sandstone is actually a sedimentary rock with a coarser texture and may be loose and deformed under damp. But because have distinctive sunken coarse sense of feeling, more close to the rough natural feeling between hill forest, reason more often apply at metope decorate. 2, SLATE SLATE is a kind of metamorphic rock with plate structure and almost no recrystallization. The original rock is argillaceous, silty or neutral tuff. The color of SLATE varies with the impurities it contains. Carbon is black or grey; Calcium - containing hydrochloric acid will bubble, so the general classification of its color, such as green SLATE, black SLATE, calcium SLATE. SLATE can be used as building materials and decorative materials. In ancient times, it was commonly used as tile in areas rich in SLATE. SLATE does not normally contain minerals. 3. Marble: As a kind of carbonate metamorphic rock, dalili is a kind of calcareous mud which is deposited slowly and crystallized on the sea floor. Changes in the pressure and high temperature due to the vibration of the strata, the more significant is that the crystals become larger and stiffer, forming the so-called marble. The texture is uneven due to the impurities in the formation, and the formation of a more lively large-scale totem changes through the movement of the formation, forming a natural marble lines like mountains and rivers. The normal life is 150 years. 4. Granite: Granite is a type of igneous igneous rock, which is caused by the weathering of rocks and sands on the surface of the stratum and slowly moving to deep channels on the sea floor. Because the magma is less dense than the surrounding rock, it is gradually pushed upward and cooled to form new 3-d crystals (igneous rock). Also because be 3-d crystal, its grain is small, the grain has stereo feeling of grain and crystal, even some granite is in the light irradiate, can send out glint dazzling burnish. It is mainly composed of feldspar, quartz and mica, and its ordinary life is 200 years. In terms of other characteristics, marble is limestone, which is lower in hardness than granite and is not resistant to acid erosion. Therefore, it is not suitable for outdoor use. Granite has high hardness and is resistant to acid and alkali, so most of it is laid outdoors or in frequent public Spaces. To sum up, the stone material choice that lives in the home in general is more on give priority to with marble, besides price is cheaper than granite outside, its organization is close, can polish, breed is various, have more pattern, colour and lustre to choose a space to wait for a characteristic to be consumer and indoor stylist are fond of important factor.