Specialists from Christie’s Sotheby’s and Philips share the stories behind these record- breaking stones.
With their breath-taking crimson hue and mystical origins, rubies have captivated humans for centuries....
Have you seen a Morpho butterfly
with its flash of blue iridescence color?
These blue flashes of color are created by an optical effect, example,
interference, refraction or diffraction of light, and not by...
The Orient phenomena is also a form
of iridescence. With pearls there is a delicate, shifting iridescent color
layer that is quite distinct from the main body color. The luster as well as
Chatoyancy, is an optical reflectance effect seen in certain gemstones. Coined from the
French word "œil de chat," meaning "cat's eye," chatoyancy
arises either from the fibrous structure of a material or from fibrous
Another type of Phenomenal Gems is the Color-Change
Gemstone. These are gemstones that display different colors according to
changes in lighting condition. This is
almost like the Chameleon monitor lizard, which changes the color...