Chrysoberyl Cats Eye:

Chrysoberyl cat's eye is a gemstone quality variety of beryllium aluminum oxide which exhibits a rare optical trait known as 'chatoyancy'. Chatoyancy is the unique ability to reflect light in a way that resembles the slit eye of a cat, hence the name 'cat's eye'. Chrysoberyl is considered the 'original' cat's eye gem, and is in fact the only gem that can be traded as simply 'cat's eye'; all other varieties must be traded using very specific names, such as 'cat's eye quartz' or 'cat's eye apatite'. Unlike most other cat's eyes, chrysoberyl can exhibit very sharp and distinct eyes under almost any kind of light, which makes it extremely attractive and desirable, especially combined with its superior level of hardness and durability.

Cats Eye describes a gemstone polished that displays a narrow band of concentrated light going accross the width of the stone. This effect, known as chatoyancy, or cat's eye effect, is caused by inclusions of fine, slender parallel mineral fibers in the gemstone that reflect light in a single band. Of all the gemstones that exhibit cat's eye, Chrysoberyl Cat's Eye is the best known. Chrysoberyl has the strongest and most distinct cat's eye effect of all gemstones. Though several different gemstones types exhibit a cat's eye effect, only Chrysoberyl's cat's eye enjoys the privilege of having the name "Cat's Eye" without any prefix. Whenever the term "Cat's Eye" is used, it refers to Chrysoberyl cat's eye by default, unless otherwise specified.

Healing power of Chrysoberyl: 

Since ancient times, chrysoberyl has been regarded as a gemstone which protects its wearer and keeps disaster at bay. The cat's eye most of all is seen as a particularly effective protective stone and talisman. Chrysoberyl is often also associated with wealth and this idea is certainly not without foundation, since in its most beautiful form as a high-quality cat's eye it is up among the gemstones of the luxury class.

Discipline and self-control are the qualities mainly associated with chrysoberyl in modern gemstone therapy. Chrysoberyls are said to promote concentration and the ability to learn, and to enable the wearer to think clearly and far-sightedly. Thanks to the secret power of the chrysoberyl, negative thoughts are said to be transformed into positive energy. And these positive qualities are said to be even more marked with a chrysoberyl cat's eye. Chrysoberyl is also regarded as a gemstone which promotes tolerance and harmony, and it is one of the lucky stones for those born under the sign of Leo.