How to distinguish a real yellow sapphire from a fakeĪ precious gem such as yellow sapphire has imitations and fakes. Often calibrated light corundums are stained in this way. They are more characteristic of the Thailand market. Diffusion sapphires are very cheap compared to natural sapphires. The peculiarity of this treatment method is that beryllium particles penetrate the stone structure and cause the appearance of a yellow color. Another common method is heat treatment with beryllium diffusion. In appearance, it is impossible to determine whether the stone was subjected to temperature, this is possible only in laboratory conditions. We prefer to select unheated specimens for our collection, since the lack of treatment enhances the investment potential of sapphires and makes them more valuable. Such natural sapphires are priced more expensive than warm ones, but with respect to the cost of the blue variety, they can be considered significantly more affordable. They are called unheated or untreated, abroad they are marked with the letter N – «natural». Despite the fact that the most of yellow and orange sapphires on the market are treated, there is a small percentage of stones that have a beautiful golden color by nature. The color changes in the entire volume, so that the heated sapphire can, if necessary, overheat or re-polish. The color obtained in this way is stable, do not be afraid that it will fade. Light-colored crystals are heated to increase the intensity of yellow, so you can get saturated, bright and orange colors. An acceptable method for changing color is heat treatment. Corundums including precious yellow sapphires are popular objects for treatment.
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