White crystal is a crystal family, transparent and opaque, fully transparent is also known as colorless crystal, in mineralogy belongs to the quartz family, the main chemical composition is silicon dioxide, pure natural white crystal silicon dioxide content of up to 99.999%, the chemical formula for the SiO2, the natural shape of the crystallization of hexagonal columns, known as the "King of the crystals! .
[white crystal]
Chemical composition: silicon dioxide
Chemical formula: SiO2
Crystal system: tripartite crystal system
Hardness: 7
Specific gravity: 2.55-2.65
Refractive index: 1.544-1.553
Origin: Brazil, Africa, USA, China, etc.
Transparent and pure, white crystals are one of the earth's magical gifts, and they are the most widely distributed and abundant of the entire crystal community. Most of the white crystals contain ice cracks, clouds and other inclusions, completely transparent white crystal unless it is a small volume (from the large raw ore directly cut and milled out), large volume and completely transparent white crystal price is more expensive and more fakes on the market. So be careful when buying.
[Recognize the real and fake].
①Look at the inner envelope
In the selection of white crystal, natural crystal surface luster is more "light green", and contains "inclusions", some are bright chips. Artificial crystals appear very pale and transparent, some contain regular oval flocculent, that is the generation of artificial crystal layer. Synthetic crystals are mostly used to make beads or to do flat processing, such as pen pendants, ultrasonic shadow carving Buddha pendants, etc.". Crystal glass" and "fused crystal" completely without any inclusions.
②Weight Identification
Natural crystals are usually heavier, and natural crystals of the same size will be heavier.
③Light Transmission
Natural crystals are birefringent. Polarized glasses, natural crystals every 90 ° turn, will show changes in light and dark, and the light underneath can be transmitted up. Synthetic crystals are dull, and the light underneath does not come through. Crystal glass and fused crystals are even duller.