CAT'S EYE : Also known as Cymophane or Chrysoberyl Cat's Eye, this is the name given to the yellow, yellow-green, or grey-green variety of Chrysoberyl, which displays the phenomenon of Chatoyancy (Cat's Eye). Some fine gemstones are honey brown. The Hindi Name for this Gemstone is "LEHSUNIA".

Appearance : The typical colour is greenish-yellow or yellowish, sometimes with a rather cold, almost grayish tone. Some fine gemstones are honey brown. It has a good lustre due to its hardness.

Occurrence : The finest Cat's Eye occur in Sri Lanka and Brazil.

Substitutes : Most commonly used substitutes of this Gemstone are Colour Changing Synthetic Sapphire, Garnet, Spinel, Fluorite.

Chemical Composition : BERYLLIUM ALUMINIUM OXIDE and the Colouring Element of the gem is CHROMIUM.