Cats Eye Chrysoberyl Gemstone Information


Cats Eye Chrysoberyl
 

Cat's Eye Chrysoberyl is both a popular and extremely valuable gemstone that is genuinely rare, being found only in a few deposits in the world. The chrysoberyl, with its hues ranging from honey-colored to mint green, is a popular gemstone, and one which is esteemed by gemstone lovers the world over. Cat's Eyes are particularly popular in men's jewelry. Cat's Eyes color ranges from a golden honey to mint green, with the rich gold colors generally being the most valued.

The attribute that gives this stone its popularity and name is the phenomena known as chatoyancy, also known in the gem trade as “the cats eye effect”. The reason for this fascinating phenomenon is very fine inclusions within the stone. When a light source is directed on these inclusions it creates a bright strip that appears and runs perpendicular to the inclusions. This strip will then glide across the surface of the stone when turned over. Though other gems exhibit this cat's eye effect,they are not as defined and distinct, giving only Chrysoberyl the privilege of having the Cat's Eye name. All other gemstones displaying chatoyancy must have their given name preceding, such as Quartz Cat's Eye.

Another interesting attribute that Cat's Eye Chrysoberyl displays is what is known as the “milk and honey” effect. When a light source is directed at the side of the stone, one side of the eye will be a milky color and opposite side will remain gold. When the stone is rotated, the colors switch.

The most important factor to consider when evaluating Cat's Eye is the strength and sharpness of the eye. The eye of the stone must have a fine line running through it that is distinct and easily recognized. The depth of the stone's color and the level of transparency are also important factors and considerably impact upon the stone's worth. These unique and astonishing characteristics along with its rarity makes Cats Eye a popular choice for connoisseurs and gemstone collectors alike.

   Cats Eye Chrysoberyl

The prices and value of Cat's Eye Chrysoberyl can vary tremendously, depending on the size and quality of the gemstone. AJS Gems is your source for the highest quality Cats Eye Chrysoberyl and many other precious colored stones from across the globe, available at Bangkok direct wholesale prices.  Creating the finest jewelry starts with finding the best gemstones, and the best gemstones are found at AJS Gems.


 
Why Buy Loose Gemstones Instead of Pre-Set Jewelry?
 
There are many reasons, but mainly it comes down to value and choice...

When buying your Cats-Eye Chrysoberyl gemstone loose instead of a pre-set stone, you can be sure that you are getting the best value for your money.  Loose gemstones are less expensive, a better value, and you can really see what you are paying for.  The most important part of getting the right price and finding the best value is to first see what you're getting.  A jewelry setting will hide the inclusions inside a gem, and can deepen or brighten its color.  With a loose stone you can much more easily inspect the gem and see it for what it really is.  In this way you can get a better idea of its true worth and be sure you are paying a fair price.

The second advantage of buying a loose gemstone is choice.  You are free to pick the exact color, cut, shape and variety of the stone for the setting of your dreams, be it yellow gold, white gold, platinum or silver; prong set or bezel set with diamond accents.  You can experience the joy of creating your very own, one-of-a-kind jewelry design. Choose from a variety of jewelry settings and styles to create a completely original presentation that will perfectly suit your individual gemstone and will be as unique as you are!

    Cats Eye Chrysoberyl Ring 


Attributes

Origin Brazil, India, Myanmar, China, Tanzania, Zimbabwe, Sri Lanka, USA (Colorado)
Color Yellow, rich gold, honey-brown to apple green
Refractive Index 1.745
Chemical Composition  BeAl2O4
Hardness 8.5
Density 3.73
Crystal Structure Orthorhombic 

Translucent yellowish chatoyant chyrsoberyl is called cymophane or "cat's eye chrysoberyl". Cymophane has its derivation also from the Greek words meaning 'wave' and 'appearance', in reference to the chatoyancy sometimes exhibited. In this variety, microscopic tubelike cavities or needlelike inclusions of rutile occur in an orientation parallel to the c-axis producing a chatoyant effect visible as a single ray of light passing across the crystal. This effect is best seen in gemstones cut in cabochon form perpendicular to the c-axis. The color in yellow chrysoberyl is due to Fe3+ impurities.

Cats eye chrysoberyl is a very hard material, with a hardness of 8.5 on the Mohs scale.  Chrysoberyl has distinct cleavage and a vitreous surface luster.  Chrysoberyl has a refractive index of 1.745.  The refractive index (RI), measured using a refractometer, is an indication of the amount light rays are bent by a mineral. Birefringence is the difference between the minimum and maximum RI. When birefringence is high, light rays reflect off different parts of the back of a stone causing an apparent doubling of the back facets when viewed through the front facet.

Most gems have a crystalline structure. Crystals have planes of symmetry and are divided into seven symmetry systems. The number of axes, their length, and their angle to each other determine the system to which a crystal belongs.  Chrysoberyl crystallizes in the orthorohombic crystal system, forming in slender prisms and usually has a "tabular" crystal habit. Crystal twinning is common.

 

Color

The popular cat's eye chrysoberyls come in many nuances between lemon and greenish yellow, and in honey colors and shades from mint green to brownish green, with rich gold colors generally the most valued. The most important value factor is the strength and sharpness of the eye.

Fine cats-eye chrysoberyl gems often also shows the "milk and honey" effect. When a bright light source is directed at the side of the stone, one side of the eye will be milky white and the other remains gold. When the stone is rotated, the colors switch. 


Cut 

Cat's Eye Chrysoberyl gemstones are always cut as cabochons for it is the only cut that will allow the spectacular cats eye effect to be displayed.  When cutting a cabochon, gem cutters will center the cats eye slit so that it bisects the stone.  The vast majority of cats eye gems have been native cut with uneven bottoms, but this is not a sign of haphazard work or poor lapidary skills. Specialists in cutting these gems are great masters at revealing and centering an eye, which frequently necessitates such unevenness.
 
Chrysoberyls exhibiting weak chatoyancy are commonly faceted.  Faceted Chrysoberyl has a honey-gold color and is found in shapes such as ovals, cushions, rounds and emerald cuts. It may remind you of yellow sapphire, topaz, or citrine. Faceted chrysoberyl is transparent, with few visible inclusions.

Treatments
 
Loose Cats Eye Chrysoberyl gemstones can sometimes be irridated in order to improve color and chatoyancy.  But this treatment is quite rare.
 
AJS Gems fully discloses any and all treatments to our gemstones.
 

Sources
 
Cat's eye chrysoberyls are mostly found in the gemstone deposits of Brazil, Sri Lanka ( Ceylon ) or East Africa.  Most chrysoberyl is found as an alluvial deposit in river sands and gravels but can also be found in metamorphic deposits of marble and corundum.  Cats eye material is found as a very small percentage of the overall chrysoberyl production wherever chrysoberyl is found.
 
A cat’s eye chrysoberyl crystal rough weighing an astounding 317 carats and a finished gem of 72 carats were displayed at a gem & mineral show in 1997. Both pieces reportedly originated in Minas Gerais, Brazil.  Despite these rare finds, this particular form of chrysoberyl is among the rarest gems on earth. The future of the cat’s eye chrysoberyl remains uncertain.
 

Mythology
 
The name Chrysoberyl is derived from the Greek words “Beryl”, meaning green and “Chryso”, meaning golden. The two words combined mean “gold colored beryl”. In spite what the name implies, Cat's Eye is not actually a Beryl at all. The name Cat's eye is derived from the phenomena displayed by this stone known as chatoyancy, which in French literally means “cat's eye”.

Cats Eye Chrysoberyl gems have been treasured for many centuries, particularly in Sri Lanka ( Ceylon ), where it is believed to be a powerful protective stone, particularly against evil spirits. Chrysoberyl has long been considered a good luck charm in numerous cultures.

As mentioned, Cats Eyes are effective protective stones and talisman. They are believed to induce positive thoughts and help promote tolerance and harmony.
 
Also because of it's golden hue, it has often been associated with wealth.
 
Chrysoberyls are known to be associated with discipline and self-control. They are said to promote concentration and the ability to learn and to help the wearer with striving for excellence.
 
In addition to this, they bring peace of mind, clearer thinking, and increased self-confidence helping one become more understanding of the fact that they have everything they already need to succeed.
 
A dream of cat’s-eye chrysoberyl foretold the coming of a treacherous moment.
 
Cat’s-eye chrysoberyl is the international gemstone of Sri Lanka ( Ceylon ).

 

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