Natural stone - method for identification of granite and marble

Characteristics of marble and granite

1, granite stone: granite stone is not colored stripes, most only color spots, there are still pure color.The finer the mineral particles, the better, indicating that the structure is compact and firm.

2, marble plate: Dali stone mineral composition is simple, easy to process, most of the texture is fine, the mirror effect is better.Its disadvantage is that the texture is softer than granite, is easy to be damaged when the hard heavy object hits, light stone material is easy to be polluted.Spread ground marble chooses monochrome as far as possible, the effect of striped act the role of cloth is better when choosing mesa.Other selection methods can refer to the selection method of granite.

Teach you a little simple distinction method: marble because easy the cause of the essence, so stone material backside carries a net, prevent transport or appear in processing damage, granite does not have this preferential treatment, so you want to see the back side of the next material to go only, of course this also is not absolute.

If you choose the back of the net stone, remember to let the master to tear down the net after the installation, the purpose of doing so is to prevent the emergence of empty drum.

The simple difference between marble and granite can be distinguished by the following five points

1, appearance: marble varieties, color diversity, in addition to blue, black other 6 kinds of colors of different varieties can be seen, granite is mostly gray white, a small amount of red, pink and yellow, generally uniform distribution of black and white points;Marble has beautiful and colorful decorative pattern generally, but not even, the grain that department forms all sorts of metallic mineral material, granite does not have commonly;Not polished closed processing marble easy weathering, the surface of the total ash, granite weathering resistance, basically no ash.

2, composition: the main component of marble is calcium carbonate, accounting for more than 50 percent, the main component of granite is silica, accounting for more than 70 percent, the composition is very different.

3, strength: the average strength, granite is 2 ~ 3 times of marble (compression, flexural, shear).You can experiment.

4, acid resistance: marble is not acid resistance, granite basic acid resistance.Take hydrochloric acid poured on the marble, bubble quickly, evaporate gas (carbon dioxide), granite basic no reaction.

5, radioactivity: according to a large number of measurement results, the average radioactive dose of granite is 1 ~ 2 times that of marble.