Stone is formed in the natural environment after at least hundreds of millions of years of complex physical and chemical changes, coupled with the evolution of geological movements. The influence of many internal and external factors will cause the ever-changing stone. This kind of change exists objectively, and no matter how it is processed in the later stage, there is no way to change it, and finally the color difference of the stone is formed.
1. Different layer of mine
The stone is mined in batches from the mine, from top to bottom, from outside to inside. In the natural environment, the outer stone is more exposed to water, air and sunlight.
The stone hidden deep in the interior has no such environment. Therefore, there are generally differences in the color of surface ore and deep ore.
After the deep ore is mined, the stone will also change under the new environment such as sunlight, air, and water, resulting in a difference in color.
2. Uneven mineral content
The basic material of marble is calcium carbonate (limestone). In addition to the basic minerals, various elements and minerals are mixed together to form the ever-changing colors and textures of the stone. The distribution of various minerals in nature is uneven, otherwise humans would not need to explore mineral deposits. This unevenness causes the difference in the color of the stone.
3. Different mining and processing methods
Stones mined from mines are usually blocks, which need to be cut into pieces, which we call big slabs.
In the processing of blocks, there are different cutting directions. This kind of processing difference, even if you pay attention to stone processing, cannot be completely avoided. The cut plates will have more or less differences.
4. Different surface processing
For the same stone variety, the color of the rough surface and the smooth surface are different.
In the smooth surface, the difference in the degree of polishing is also very obvious. The brighter the stone is, the more obvious the pattern and color of the stone will be, and the brighter the rough surface will be.