The bright color of ruby, mainly caused by chromium oxide, can produce very valuable pigeon blood red at 2%. About 80%-90% of rubies on the market today are artificially optimized to varying degrees. Most of the rubies currently on the market have been treated at high temperatures, and this manual treatment is not easily detected.
Heat treatment: When the ruby ​​is heated to a certain temperature, the color of the ruby ​​is often improved, the transparency is improved, part of the ribbon and some inclusions are eliminated, and some cracks are healed, so that the lower quality ruby ​​is changed. In a higher grade ruby. Since heat treatment is a purely physics method, it is thought to be understood as making up for the shortcomings of nature. Nowadays, the jewelry industry has generally accepted this kind of treatment, which is considered to be acceptable and permissible. It can be equivalent to real natural ruby. It is sold at an equivalent price without special statement. Even if it is identified, it is not considered fraud.
Re-dyeing: This is the so-called diffusion processing technique. Diffusion treatment is an artificial means of chemical treatment to allow chromium oxide in chemical reagents to flow into the crystal lattice of corundum, so that those colorless corundums have acquired the ability to produce red. Although its coloration mechanism is exactly the same as that of natural ruby, and it does not fade with time, people still regard this method as a post-treatment. The gemstone thus treated cannot be sold as a natural ruby.
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