Abstract: the natural crystal jewelry in the family, it is widespread and common one of the oldest gem, has the very high ornamental value, technology value and certain health care function, this paper has carried on the business to natural crystal classification, and sums up the natural crystal technology development direction, make I save precious crystals can fully develop and utilize resources.
Key words: natural crystal;Process development;
Common flaws in folded crystals
1. hidden crack
In transparent crystals, hidden cracks appear in shiny sheets and sometimes have a halo effect.These cracks are crystal in the growth process, encounter external force compression and internal production of some invisible cracks, hidden cracks in hibiscus stone, amethyst, white crystal ball and white crystal column are very common.Some of the cracks are then filled with material to form a closed crack, that is, the original crack persists.This crack has a relatively small effect on the crystal.