diamonds expensive reason

At present, the reason why diamonds are expensive, and their characteristics are inseparable.First, the diamond hardness, high density. Diamond is the hardest natural substance known, Mohs hardness of 10. The density of 3.52 over its most natural stones, and very stable. The tile saw blade  nature of gravity separation and identification are very important.In addition, the diamond will not only have a high refractive index, but also has a higher dispersion. These two factors, making the diamond cutting and grinding after the show dazzling bright light.
There is a high thermal conductivity of diamond, and its thermal conductivity of copper five times. Designed for the application of this tct saw blades  principle can be used to identify the thermal conductivity meter diamond imitation. Some natural blueDiamond, boron element because, further comprising electrically conductive properties.Diamonds are very stable, temperature changes with minimal impact on its size, it does not react with the acid and alkali.Diamond has the lipophilicity of this nature commonly used in diamond sorting; surface of the water droplets in the diamond shape cutting tools  and will not spread, this property can be used for the identification of diamonds and imitation.High hardness and stable chemical properties make the beauty of the diamond and the environment will not change over time, which is able to increase the value of the diamond foundation. Diamond formed under harsh conditions so scarce reserves, and is non-renewable resources. Into the global market each year are affected by De beers diamond company strictly controlled. The so-called rare