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Chatham® Blue Sapphire Gemstone Information
Information * Loose gemstones * Jewelry links

Blue Sapphire is the birthstone for the month of September and the gemstone representing the 5th and 45th wedding anniversaries. The ancients believed sapphires influenced spirits, guarded against unchastity, made peace between enemies, and protected them from capture. They were also thought to clear the mind and skin, cure fevers, colds, eye diseases, and ulcers. Sapphire is a longtime symbol and guardian of purity, and it represents truth, sincerity, and consistency.

ENHANCEMENT CODE H
Click to view AGTA code.

PROPERTIES
Refractive Index 1.762-1.77
Hardness = 9 (Moh's Scale)
Specific Gravity =4.0
Species - Corundum
Optic Character - Double Refraction.
Phenomena - Chatoyancy (Very Rare)


WARNINGS FOR CARE

Ultrasonic: Usually Safe
Steamer: Usually Safe
Heat: Poor; may sometimes Improve color, but may cause loss of color
Chemicals that harm: Borax

 
Chatham sapphire crystal growth image.

Sapphire crystal growth.
Image Courtesy Chatham®.


Crystal Structure
Crystal system: Hexagonal (trigonal), dipyramidal, barrel and tabloid shape.
 

Birthstones
 January  Garnet
February Amethyst
March Aquamarine
April Diamond
May Emerald
June Pearl/Alexandrite
July Ruby
August Peridot
September Sapphire
October Opal/Tourmaline
November Topaz or Citrine
December Blue Topaz or Zircon
Common Cut Examples.
Chatham sapphire image - Brilliant cut.
Round cut.
Chatham sapphire image - Oval shape.
Oval shape.
Chatham sapphire image - Marquise cut.
Marquise cut.

Chatham sapphire image - Pear Shape.
Pear Shape.
 

Chatham sapphire image - Emerald cut.
Emerald cut.
 

Chatham sapphire image - Heart Shape.
Heart Shape.
 
Chatham sapphire image - Trillion Cut.
Trillion Cut.
Chatham sapphire image - Straight Baguette.
Straight Baguette.

Chatham sapphire image - Princess cut.
Princess cut.
Step Cut.
 


 

 
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