GREEN OPALITE 'CATS EYE'' 8.40 CTS [V631 ]

Item Description Pictures Bidding History Comments

* Hint: Click on the thumbnails above to see the full sized version. Images are of the actual item unless otherwise indicated.

CATS EYE OPAL

 This is a stunning  cats eye opal from Tanzania -Africa.It is well polished with a high dome showing chatoyancy properties.Because of its glossy polish you will see a reflection of the lights we use on the stone.

Hardness mohs scale 5.5 to 6.5 

 

Natural stone DYED 

Weight 8.40  cts

size 16 x 12 x6.5 mm

 Chatoyancy  or chatoyance, is an optical reflectance effect seen in certain gemstones Coined from the French "oeil de chat", meaning "cat's eye", chatoyancy rises either from the fibrous structure of a material, as in tiger eye quartz, or from fibrous inclusions or cavities within the stone, as in cat's eye chrysoberyl The effect can be likened to the sheen off a spool of silk: the luminous streak of reflected light is always perpendicular to the direction of the fibres. For a gemstone to show this effect best it must be cut  cabochon, with the fibers or fibrous structures parallel to the base of the finished stone. Faceted stones are less likely to show the effect well.

Cats Eye Opal was  formed app  15 to 30 million years ago, during the tertiary period. Starting out as a liquid it seeped through sedimentary layers of earth, settling within impervious clays at a depth of 20 to 30 metres. Over the coarse of millions of years, the liquid slurry crystalized, becoming catseye opal.

Cats-Eye Opalite is a rare chatoyant form of Opal.  The attribute that gives this stone its popularity and name is the phenomena known as chatoyancy, also known in the gem trade as “the cat's 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.  This natural gemstone is found only in Tanzania.  Opalite Cats Eye is best known for it's creamy honey color and strong cats-eye effect. Opalite Cats Eye can also occur in shades of yellow, red, white and black.

The physical structure of Opalite Cats Eye is unique. Tiny spheres of silicon dioxide form a pyramid shaped grid interspersed with water. Tiny natural faults in this grid cause the characteristic "play of color". The effect is similar to the rainbow colors displayed on a soap bubble, only much more dramatic.  The incredible play of color is exhibited by the gemstone due to the presence of small spheres in the silica gel that causes interference and refraction appearance. Silicon and oxygen chains are packed in the spheres and these are uneven in size and incoherent in concentration. These are set in a compact structures thus, when ray of light falls it dissects the light on its way through the stone resulting in the awesome color play. As per the size of the spheres within the structure, changeable colors of the gamut are diffracted. With the increase in the consistency of the spheres position, more intense and brilliant would be the color play. 

Australian buyer have to pay 10% gst and auctions are in $ US
ONE ITEM
Our basic shipping /handling fee is $4.00 per item sent first class airmail.
FOUR ITEMS
We offer a combine shipping/handling of 4 items from the one site for $9-this is done automatically when you go to paypal.
EIGHT ITEMS
You must have 5 feed backs and contact us before bidding and we will send you a paypal request with a handling/shipping fee of $15
EIGHT TO 30 ITEMS
You must have 10 feedbacks to purchase larger numbers and contact us before bidding.We will send this parcel by courier express with a tracking number for $45

PLEASE NOTE-We have the following sites listed below so if you pay insurance for one site we can send all the orders together so only pay insurance once.

At Opal Auctions we have the following sites one click away. :

SEDAOPALS

BOULDER MAGIC

COOBER PEDY FIRE

QUALITY OPALS

SEDA ROUGH OPAL

VOLCANIC OPALS

At Gem Rock Auctions we have the following sites. :

SEDAGEMS

MINERAL GEM WORLD

GEMS TO WEAR

QUALITY ROUGH

PEARL FARM

SEDA DIAMONDS

At Jewelry Auctioned we have the following sites :

SEDA JEWELERY

Money back guarantee on all stock

No Comments