Cymophane Cat's Eye Chrysoberyl
A chatoyant variety of chrysoberyl is called "cymophane" or "Cat's eye," and is usually a translucent yellow. The name "cymophane" is derived from the Greek words "wave" and "appearance" (wavy appearance).
As a wedding gift cymophane symbolizes the 18th anniversary.
Gemological information for Chrysoberyl
Color
Yellowish-green, yellow, brown. Alexandrite: blue-green to green red to purple color change ...
cymophane, alexandrite, cats eye
Crystallography: orthorhombic
Colors: green/red (alexandrite), greenish or brownish yellow to translucent and chatoyant (cat eye) colorless to brown
Hardness: 8.5
Specific gravity: 3.71 - 3.73 ...
It is also called as Cymophane. It consists inclusions as thin as needle within its structure. These inclusions reflect the distinct band along the center of the gem when light rays passes across the crystal.
There are three main types: ordinary yellow-to-green Chrysoberyl, cat's eye or Cymophane, and Alexandrite. The yellow colour of the most common form is created by iron trace elements in the mineral.
Chrysoberyl cat's eye, also known as cymophane, is of honey color, a medium yellow with modifying brown. Alexandrite changes color from red to green depending on the type of light it is viewed in. The stone is extremely durable.
Chrysoberyl is a hard, tough, and durable gem. Chrysoberyl gems are yellow, and some are brown or green. There are two very rare varieties of chrysoberyl, the color changing alexandrite and the chatoyant cymophane.
Chrysotile (group name - asbestiform serpentine)
Citrine (yellow variety of quartz)
Cleveite
Coltan (short for minerals of the columbite group)
Crocidolite (asbestiform riebeckite)
Cymophane (variety of chrysoberyl) ...
 See also: Chrysoberyl, Gemstone, Stone, Jewelry, Jewel
  
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