Gem Phenomena

Gem phenomena, or optical phenomena, are the observable characteristics of gemstones, such as asterismplay-of-color and chatoyancy. Phenomena are usually a result of light interacting with inclusions such as asterism and chatoyancy, or light interacting with the structure of the gem such as with play-of-color in opal.
Star Ruby, Diamond, Platinum Ring Displaying Asterism.

Star Ruby, Diamond, Platinum Ring Exhibiting Asterism.

Chrysoberyl, Diamond, Platinum Ring Displaying Chatoyancy.

Cat’s Eye Chrysoberyl, Diamond, Platinum Ring Exhibiting Chatoyancy.

Black Opal, Diamond, Platinum Ring Displaying Play-of-Color.

Black Opal, Diamond, Platinum Ring Exhibiting Play-of-Color.