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$32.00 USD
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195.00 CTS 'CATS EYE ' ROUGH OPALITE-IRRESDANT [FLA131]

6033
15

Artikelnummer
Abmessungen (mm)
x x mm
Gewicht (cts)
Certified Gemstones
NEIN
Typ
Rough
Farben

 

QUALITY ROUGH

CATS EYE OPALITE ROUGH 

This is a  green natural untreated rough specimen from Brazil showing chatoyance [cats eye] effect.We have selected this piece as it has a strong cats eye effect.Beautiful irresdant display making it a pleasure to polish or to keep as a specimen.

Hardness mohs scale 5.5 to 6.5 

 

Natural untreated rough

Weight 195.00 cts

size  41 x 32 x 28 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. Opalite Cats Eye can also occur in shades of  green 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. 

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Rest der Welt
FedEx erhält Rabatt auf $39.00 bei Bestellungen mit 2 oder mehr Artikeln
Registered Shipping $9.00 / 7 $16.00 / 21
Australia
Registered Shipping erhält Rabatt auf $9.00 bei Bestellungen mit 2 oder mehr Artikeln
Rest der Welt
Registered Shipping erhält Rabatt auf $16.00 bei Bestellungen mit 2 oder mehr Artikeln

sedagems
Hi Welcome to the Sedagems store, Run by Paul Sedawie and specializing in Australian sapphires and gems stones he has collected on his many buying trips world wide. All stock has a money back guarantee as your continued business is our business.
Mermaid Waters , Australia
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19056 Feedback

  • rustynut
    rustynut
    Positiv

    Good stone great service

  • martin11
    martin11
    Positiv

    Great thank very much, lovely pearls.

  • philsgems
    philsgems
    Positiv

    Nice piece of rough. thankyou

  • philsgems
    philsgems
    Positiv

    Nice stone. Thankyou

  • philsgems
    philsgems
    Positiv

    Have received the rough. Nice colour. Thankyou

5%
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Gültig bis
2nd Jan 2025

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Versanddetails

Versand:
$16.00 21 über Registered Shipping
Schiffe von:
Australia

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Dieser Verkäufer fügt den Transaktionen in Australia 10.00% tax hinzu.

Überblick

Auflistungstyp : Standard
Produkt ID : 333326
Beginnt : 24th December 2024 05:00 pm PST
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