China gemstone measure of value, nothing more than the following four conditions:

1.Color 2. Clarity 3. Refractive Index 4. Hardness
1. Color: The color in addition to red, orange, yellow, green, blue, indigo, violet, and white, there are many we know, even can not imagine the color of the body are likely to occur in china gemstone. As long as it's the color the more pure, more moderate concentration, the higher the charm, the more valuable.
2. Clarity: Clarity higher (that is, the fewer impurities), its color more pure. Refractive index of the more affected, the higher the degree of permeability, products made from the more enjoyable of course, the higher the value of nature.
3. Refractive index: Why do stars flicker, often described as dazzling in its body? After the shoot china gemstone because of the light was refracted produce bright, shining results. Therefore, the higher the refractive index, it's light more strongly rich, dazzling effect of the higher, of course, the more valuable.
4. Hardness: in the air of Si (Si) is everywhere, and silicon Mohs hardness (Mohs) is 7 degrees. Hardness below 7 degrees below, often exposed to air, it is easy to be contaminated with a silica-based dust to scratch, so the natural hardness of china gemstone is not affected, more solid, permanence, After polishing brightness brighter, so its value is necessarily higher.