Site Contents

Gemstone Crystal System Density Hardness Refractive index Treatments
Chrysoberyl
orthorhombic 3.72 8.5 1.746-1.755 none


chrysoberyl

Color:
Chrysoberyl occurs in many colors, predominately shades of green and brown. Chrysoberyl cat's eye is honey color, a medium yellow with modifying brown. Alexandrite will change colors from red to green depending on what type of light it is viewed in.

Clarity: Type I Transaprent green and yellow
Optic Character:
DR Biaxial Positive
Cause of Color: Fe
Fluorescence: Generally Inert
Fracture : Concoidal

Luster : Vitreous to greasy
Cleavage :
Indistinct; 3 directions; rarely seen
Durability: Excellent

Characteristics for Identification:
Silk, fingerprint inclusions,twinning planes, step-like glide planes

Localities:
Russia, Brazil, and Asia

rough chrysoberyl

Chrysoberyl

BeAlO2

Chrysoberyl is a beryllium aluminum oxide, not at all related to the mineral beryl, which is a silicate. The most valuable varieties of chrysoberyl are alexandrite, and cat's eye. Cat's eye was long admired in the orient for its chatoyant character, but it wasn't popular in the West until the late 1800's. The third and most common variey of chrysoberyl is a transparent greenish yellow stone. It was very popular in Victorian and Edwardian jewelry. Cat's eye is believed to protect one from evil spirits or the evil eye. According to the Hindus, the stone would preserve your health and guard against poverty. In Asia it was thought that if you pressed a cat's eye between your own eyes it would enhance your foresight.

Chrysoberyl Family

Alexandrite
Catseye Alexandrite
Chrysoberyl
Catseye Chrysoberyl
This gemstone is often confused with:
Tigereye
Yellow Sapphire
Topaz
Citrine
Tourmaline
Glass
Plastic