Black granite is a natural stone material with properties such as dirt resistance, acid resistance, wear resistance, compression resistance, and insulation.
Main types of black granite in China
Basalt is one of the important rock types in black granite. The color is mostly black or grayish black, with fine and dense blocks. Its compressive strength is about 3500-5000kg/cm2, and it has strong acid resistance, wear resistance, compression resistance, and insulation performance. Basalt is widely distributed in China and has been produced in almost all geological periods. Famous brands such as Fuding Black. Fuding basalt ore in Fujian is a rare high-quality black granite basalt ore in China, with over 500 natural stone processing enterprises and an annual mining capacity of nearly 100000 cubic meters. Orderly development and comprehensive utilization are the main directions for its sustainable development. Other natural stone varieties such as Mongolian black. In addition, the basalt stone mining industry in Yunnan and Heilongjiang may also be under development.
Gabbro is also an important rock type of black granite, with a predominantly black and pure color. Partial black background and white dot pattern decoration, with stone varieties such as Forest Green (Hebei, Henan). The main types of rocks are gabbro and diabase. However, from the perspective of commercial purposes, they are all named after granite. Basalt is an extrusive rock with a darker color. The mineral particles contained are uniform and small, making it difficult to distinguish natural stone varieties with the naked eye, even with a magnifying glass. Basalt is the most widely distributed igneous rock. Most basalt is formed during volcanic eruptions, when magma is ejected and encounters cold air, it rapidly solidifies with the flow of lava. Some basalts are intrusive rocks, and during volcanic eruptions, magma does not erupt from the surface and solidifies when cooled inside the Earth.
Diabase, a shallow facies rock of basic intrusive rocks, is also an important rock type of black granite in China. The black granite brand is like Tai Bai Qing. Tai Bai Qing, also known as Shanxi Black, is called Night Rose in Japan and can be compared to or even better than South African Black and Indian Black. According to research, the main rock type of Shanxi Black is diabase, also known as Shanxi Black A. In China, the best quality black granite is Shanxi black A-grade, and its price is higher than any high-end black granite produced in India. Shanxi Black A contains the following actual mineral components: about 50% plagioclase, with twin crystal development; Ordinary – about 35% of variable pyroxene; A small amount of medium feldspar, about 5%; A small amount of minerals include hornblende, biotite, titanium magnetite, etc. According to the structure, it can be divided into three brands: Dahua, Zhonghua, and Xihua, with Zhonghua being the best. Similar varieties include Fengzhen Heihe Hebei Pingshan Wannian Qing, etc. There are some golden dots on the polished surface of some Shanxi blackboard materials. Many manufacturers do not like this quality of board, so the price will be relatively lower. If you like this black natural stone with golden dots, and the price is reasonable, the quality inspection is qualified, and it has not been dyed, then you will buy it very well.
The first mistake about pure black hemp: some people think that all pure black hemp granite is the same material. Actually, they may have significant differences in color, quality, and price.
For pure black hemp, what everyone knows is Sutareboda, a black granite produced in Sweden