Alexandrite Effect
The "Alexandrite Effect" is a phenomenon in which a stone appears to be different colors depending upon the type of light it is viewed in.
Alexandrite Effect: A phenomenon in which a stone appears to be different colors depending upon the type of light it is viewed in. Many other stones, including ammolite, garnet and sapphire, exhibit the "Alexandrite Effect." Also called Dichroism ...
The color change or alexandrite effect is a rare, beautiful and desirable property in gemstones. White light is made up of a balanced mixture of red, orange, yellow, green, blue and violet light.
Alexandrite effect
Color change is a distinct optic phenomenon, which has been seen in several gems. Alexandrite is the best example for showing Color change effect. For this reason sometimes it referred as Alexandrite effect.
There are some other stones which exhibit an alexandrite effect: natural and synthetic sapphire, garnet, synthetic spinel, zultanite (diaspore), synthetic cubic zirconia
Treatments
None known ...
Color change from one end of the spectrum to the other, aka the alexandrite effect, is rarely seen in sapphires and often is caused by the presence of vanadium.
Alexandrite, named after the Russian Czar Alexander II, is a greenish chrysobery that appears red in artificial light. It is typically used as a gemstone in jewelry. The "Alexandrite Effect" refers to its ability to change color under different light.
light source as compared to its color as seen under daylight or a daylight equivalent fluorescent source. Due to this phenomenon's strong association with the Alexandrite variety of chrysoberyl, it is sometimes termed the "Alexandrite effect", ...
 See also: Gemstone, Beryl, Color, Garnet, Sapphire
  
|
RSS
