Shanxi Black is a kind of granite with the most absolute black in the world. With the advantages of well-proportioned structures, grey grounding color, and also pure & ashine black, its quality has alreay exceeded the one of India Black. At present, it is popular to be processed as slabs, countertops, washbasins, monuments, and so on.
Shanxi Black has different quarries. It is known as follows:
1: Pure black face: This quarry located in Datong City. The quarry’s production is over 20,000CBM. But it has been greatly reduced due to the lower production rate of premium quality of pure black granite. The cost of premium quality of pure black (without any gold flecks) is extremely high because the availability is becoming difficult and rare.
2: Black face with gold flecks: Located in Hunyuan County. This material has three quarries: GL, GF, HG.
GL: is a quarry good at face (black ground) and gold spot is small and scarce. It's of the 1st choice quality of this black granite.
GF: is a quarry with bigger gold flecks.
HG: is a quarry with small gold flecks and densely covered
3: Side quarry: Not pure black, without gold flecks, the background has very fine cyan flower. Many Chinese factories are using chemical ways to dye such black into pure black. But color & shade difference will appear after the installation when it has been exposed in the light for a period of time.
Many Chinese factories now also polished with black dyestuff. It is more shining after the processing. They just use less expensive or cheap black granite to replace with pure shanxi black. But it will fade in the sun light and high temperature.
Shanxi Black quarry is not like other materials’ quarries, it is very special, and it comes out by grain not cube meter. It is integrity like an egg.
Physical parameters of Shanxi Black:
Water absorption: 0.105%;
Compressive strength: 218.7Mpa;
Flexural strength: 30.5Mpa;
Destruction coefficient: 64.7Kgf/cm2;
Mohs hardness: >6
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