Diamonds are the hardest natural substances. A diamond can carve any other gem, but no other gem can carve a diamond. You can also use the "standard hardness tester" to score, and any hardness below 9 degrees is a fake diamond. Diamonds are also lipophilic. If you draw a line on the surface of a diamond with a pen, it will become a continuous straight line, while other gems will break intermittently. The above methods have certain reference value for identifying diamonds. You can also observe it through a magnifying glass with a magnification of 10. Under the magnifying glass of 10 times, you can see that most diamonds have triangular growth lines, and the surface of diamonds has "red, orange and blue" fire light. Radiant. The most accurate and reliable method is to measure the thermal conductivity data with a "thermal conductivity meter" to distinguish between genuine and fake diamonds, but the "thermal conductivity meter" is expensive.

Because diamonds are the first noble and luxurious ornaments, it is not uncommon to replace or pass off diamonds with cheap gems, artificial gem and even glass. Common fake diamonds are as follows:

① Zircon: Very similar to diamond, it is the best substitute for diamond. The identification method is that zircon has polarization and large birefringence. Observing the processed zircon prism surface with a magnifying glass of 10 times, it can be seen that the bottom edge line has obvious ghost, but the diamond has no ghost phenomenon.

(2) Glass: The refractive index of glass is very low, and there is no flickering color light like diamonds; Especially when it sinks into the water, the glass product loses its luster and immediately shows clues.

(3) Soviet diamond: cubic zirconia, first developed by the Soviets, hence the name. Soviet diamond is a synthetic compound, but it is very close to natural diamond in dispersion and refractive index, and it also has the attractive appearance of "fire" light. But its hardness is low (8.5), so it can be distinguished from diamonds. Moreover, the thermal conductivity is much lower than that of diamond, so it can be identified and distinguished accurately by "thermal conductivity meter".

④ Crystal: Although crystal is a transparent crystal of natural minerals, it looks like a diamond after processing, but it lacks the colorful light of diamond.

Diamonds are graded according to 4c ~

1 is the weight-that is, Claro!

2 is the fineness-diamonds are mostly pure white and colorless, with 1 element called pure carbon crystal ~ and other colors like pink ~ green ~ blue ~ brown, etc. They have other colors because they contain nitrogen.

3 is quality-diamond is a natural mineral, containing other minerals or natural defects ~ so the less other minerals in diamond, the higher the price! !

4 is cutting-the vernacular means that the better the cutting, the more expensive it is ~ a badly cut diamond will have no luster, so polishing and symmetry must be good to make the diamond beautiful.

As for the proportion of diamonds, it is 3.52.

Prices can be measured by colors, ranging from colorless, light yellow, gray to tan. In addition, there are dark yellow, brown, blue, green, pink to red. These special colors are more valuable because they are very rare. The more carats, the higher the value of diamonds.