The growth environment of crystal stone is mostly in deep underground and caves, which requires abundant underground water and saturated silica. The pressure is about two to three times that of atmospheric pressure, and the temperature is between 550 and 600℃.
They grow underground for more than 80 million years, and the crystals will crystallize into hexagonal columnar crystals according to the natural law of "hexagonal crystal system". There are many grains without disorder, all crystal tips point to the center of the hole, and the growth is regular.
Extended data:
The difference between crystal and glass is as follows:
1. Crystal is crystal and has birefringence to light, while glass is amorphous and has no refraction. So it can be clearly distinguished with the help of polarizer.
The hardness of glass is lower than that of crystal, so crystal can always carve glass, but glass can't carve crystal.
3. Crystal has high thermal conductivity, while glass has low thermal conductivity, so crystal feels cool and glass feels warmer.
References:
Baidu Encyclopedia-Swarovski