CERTIFIED NATURAL BROWN STAR SAPPHIRE 23.84 CTS 0512

Item Information

Dimensions (mm) 15 x 15 x 9mm
Weight (carats) not provided
Colors
Certified Gemstone
Filled Cavities or Fissure/Cobalt
No Treatment
Heat Treatment
Beryllium Treated
Surface Diffusion

 NATURAL BROWN STAR SAPPHIRE GEMSTONES

The star is a result of the light reflecting of off of the silky crystallizations of rutile inside the stone.

 

CLARITY VS, EYE CLEAN.

SAPPHIRE SIZE   14.68 X 9.45 MM

SHAPE:  SEMI ROUND CABOCHON

TREATMENT: NONE

PIECES:  AS IN PICTURE

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IN THIS AUCTION YOU WILL ALSO RECIEVE:

THE CERTIFICATE OF AUTHENTICATION OF THE GEMSTONE AND ALSO

A COPY OF THE GEMOLOGISTS' CREDITATION FROM THE GEMOLOGICAL INSTITUTE OF AMERICA

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GEMOLOGIST INFORMATION:

COMPANY GEMMOLIGIST HAS CERTIFIED THIS GEMSTONE AND CERTIFICATE INCLUDED WITH THIS GEMSTONE

AS NATURAL STONE,

MANSOOR RAHMAN GRADUATED FROM GEMOLOGICAL INSTITUTE OF AMERICA IN 1979

AND HAS WEALTH KNOWLEDGE ABOUT GEMSTONES AND ACTS AS CONSULTANT TO STARS AND GEMS

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SAPPHIRE GEMOLOGY INFORMATION:

Sapphire gemology
Species: Corundum
Color: Blue, colorless, pink, orange, yellow, green, purple, brownblack
Chemical composition: Al2O3, Aluminum Oxide
Crystal system: (Trigonal), doubly pointy, barrel-shaped, hexagonal pyramids, tabloid shaped
Hardness: 9 (Mohs scale)
Specific gravity: 3.95 - 4.03 
Refractive index: 1.762 - 1.788 +0.08 -0.04
Birefringence: 0.008
Optical character: Uniaxial
Color of streak: White
Absorption spectrum: Blue, Sri Lanka: 471, 460, 455, 450, 379; Yellow: 471, 460, 450; Brown: 471, 460-450
Fluorescence: Blue: none; Colorless: orange-yellow, violet

18h 3m 11s

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Audit Information

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Pricing & Details

Bid Increment $1.00
Starting Bid $145.00
Auction ID 179675
Watchers 3 watching
Viewed 1,547 times
Starts 1st Dec 2016 5:02pm PST
Ends 3rd Dec 2016 5:00pm PST

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