If you've ever bought a sapphire stone, you've probably wondered whether it will fade in the sun. The answer is not necessarily black and white. The color of a sapphire stone is influenced by a variety of factors, including the type of sapphire it is, Ceylon yellow sapphire the quality of the stone, and whether it's treated with heat enhancement or other methods.
Color center of sapphire stone
Sapphires' color centers change in response to different sources of light. They become active when they are exposed to certain types of light, such as sunlight, and they relax when they are not exposed to light. Ultraviolet radiation plays a major role in the process. This is one of the reasons why some sapphires can appear to fade in the sun.
In order to perceive color, we need to understand how light is absorbed or emitted by matter. Basically, a sapphire's color is the light wavelengths that reach our eyes. Unlike a ruby, a sapphire stone can absorb only light that falls within a specific wavelength range.
Changes in sapphire color under x-rays
Changes in sapphire color under X-rays can be detected in several different ways. One way is to examine sapphire crystal structure. This technique reveals a variety of inclusions. Typical inclusions include rutile needles and boehmite crystals. The other is to observe color zoning. The former type of inclusion is most easily detectable by naked eye.
Sapphires that have undergone x-ray treatment usually develop a beautiful amber or golden hue. The process takes five to ten minutes and is best applied on facetted gems and horizontal surfaces. The color of the stones is most noticeable at the surface of the gem, and fades away slowly near the crown.
Effects of sunlight on sapphire stone
Exposure to sunlight causes certain effects in sapphire stones. For example, it can cause the stone to glow pink due to the presence of Cr3+ impurities. After the stone is removed from DiamondView, the color will change to a brownish color. Nevertheless, Get to know Natural yellow sapphire stone price the stone will return to its original color after fifteen minutes of exposure to daylight.
Sunlight affects sapphires differently, depending on their color and their location. They can sparkle in bright light and remind the wearer of a summer sky. However, sapphires in the darkest tone will not have the most attractive color. The deepest blue sapphires, however, are still blue even under artificial light.
Sources of sapphires
When sapphires are exposed to sunlight, they will exhibit slight signs of fading. While this happens naturally, it is more noticeable in white or pale yellow stones. Blue sapphires can naturally turn muddy green, light lilac stones can turn pink or rosy orange, and common gray star sapphires can turn yellow brown. The colors change more dramatically in natural sapphires than in synthetic ones, but both types will show slight changes.
Sapphires that fade in sunlight are called color change sapphires. While this color change is naturally occurring in sapphires, it is still uncommon to talk about it as a natural feature.
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