How to identify red sapphire

True and false red sapphires can also be distinguished. Ruby and sapphire are considered to be precious stones after diamonds and one of the most important types of gemstones. From a mineralogical point of view, they are all minerals of corundum crystals, but the colors are different. The so-called ruby ​​refers to red corundum with ruby ​​quality; while sapphire has a wide meaning, including corundum of any color with gem quality other than red.

The real red sapphire belongs to the trigonal system and its chemical composition is aluminum oxide, which has the same chemical composition as corundum. If other chemical components are displayed, of course it is not corundum. Natural red sapphire can form large and small pits on the surface during the growth process, but artificially there is no such phenomenon, but there can be a layer of "circular growth line", if you see these on the surface of the gemstone With a linear structure, you can conclude that this is not a true gem. In addition, natural red and sapphire are surrounded by other natural mineral crystals during the crystallization process. These minerals are often encapsulated in red and sapphire crystals to form inclusions. These inclusions have two major characteristics: one is an angular shape with an angular shape; the other is often arranged in a certain direction, intersecting each other at an angle of 60°. When viewed by the naked eye, it seems that the surface of the red and sapphire has many filaments. This is precisely an important symbol of true gems. On the contrary, inclusions can also appear in artificial red and sapphire. Its inclusions are not various minerals, but bubbles. The appearance of bubbles is usually irregular, densely integrated, or curved.

In-house analysis can be used to identify natural and artificial red and sapphire by spectrometer. Professionals believe that natural red and sapphire can be seen in the blue part of the spectrum of the spectroscope with a black line with a wavelength of 450 mm. This must be true natural red and sapphire. If there is no such black line, it must be a fake - artificial red, sapphire.