أخبار المجوهرات

silver bangle manufacturers Aura shine-special optical effects of gemstones (part 2)

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3. Color changing effect

The color produced by the interference and diffraction of the special structure of the gemstone changes with the light source or the observation angle. This optical phenomenon is called the color change effect. Opal is a typical gemstone with a color changing effect.

أربعة, discoloration effect

The phenomenon that the color of gemstones changes with the wavelength of the incident light is called the discoloration effect, which is mainly caused by the color of some gemstones containing pigment ions such as chromium (كر) and vanadium (الخامس). The main reason for this discoloration effect is that the selective absorption of colors by gemstones reaches a balance or there are two distinct color light transmission bands distributed alternately. Alexandrite is a typical gemstone with a color-changing effect. It is green under sunlight and red under incandescent light. In addition to alexandrite, gemstones with color changing effects include Colombian vanadium-containing sapphires, Thai green sapphires, East African chromium-vanadium spessartine garnets, partially synthetic cubic zirconia, synthetic corundum mimics, and synthetic spinel mimics Stone etc.

خمسة, the halo effect

The halo effect is the color caused by the interference of light in the gem due to the special structure of the gem or the inclusion in the gem, such as the halo of the labradorite.

6. Moonlight effect

Moonlight effect refers to the floating white or blue brilliance of feldspar translucent or milky white cabochon gemstones due to scattering, interference, and diffraction on the surface, which appears to be hazy moonlight effect, such as moonstone.

Seven, placer gold effect

The placer gold effect refers to the sparkling effect produced by the reflection of small flake minerals in transparent or translucent gemstones, such as sunstone.

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