alexandrite, cat's-eye, and chrysoberyl. While
chemically alike, they are quite distinct in their
optical characteristics and bear no resemblance
to one another.
Cat's-eye chrysoberyl is known for its reflected
light effect called "chatoyancy." This effect is
achieved by cutting stones which have very
small, parallel "silk" inclusions into cabochons
(dome shapes, not faceted). As the gem is
rotated, it exhibits a distinct, silvery white line
across its dome which seems to open and close
like a cat's eye.
Cat's-eye is a translucent gem ranging in color
from a honey yellow or honey brown to yellowish
green to an apple green.
It has long been used as a charm to guard
against evil spirits, and one can understand why,
given the pronounced eye effect (the eye could
see all, and it watched out for its wearer). It was
also believed that to dream of cat's-eye signified
treachery. It has also symbolized long life.
To maintain its brilliance, immerse in a jewelry
cleaner or in lukewarm soapy water and clean
with a small bristle brush. As with all gemstones,
care should be taken to protect ft from scratches
and sharp blows.
Cat's eye chrysoberyl is found mainly in Sri
Lanka and Brazil.