The difference between crystal and glass
The difference between crystal and glass:
Crystal and glass look very similar, but they are two completely different materials. The main differences are as follows:
First, the material is different: crystal is a crystal of silica, and glass is only a molten state mixture containing silica.
Second, the effect is different: the glass only has a decorative effect, and the crystal has a piezoelectric effect in addition to the decorative effect, and has a special health care effect.
Third, the price is different: the unit price of crystal is several times or even several times higher than glass.
Fourth, the physical properties are different:
1. Crystal is a crystal with high hardness (Mohs grade 7), while the hardness of glass is low (Mohs 5.5). Crystal can mark on the glass, but not vice versa.
2, crystal is a crystal body, good thermal conductivity, with the tip of the tongue touch the cold feeling. The glass is warm.
3, with a polarizer to distinguish, crystal can transmit light, while glass can not.
We can easily distinguish them based on the different physical properties of crystal and glass.
Fifth, the processing technology is different: the glass can be hot-casted, saving labor and labor costs. Crystal is a crystal, which cannot be reversed after heating and melting, so it cannot be cast by hot casting, and only cold working such as cutting or grinding can be used. It costs a lot of money and costs.
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