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Black Star & Blue Star Sapphire Gemstone Information.
Information * Loose gemstones * Jewelry links

The three crossbars of star sapphire represent faith, hope, and charity. It was once used to ward off bad omens and the evil eye. Star Sapphire was considered so potent that its influence would remain with the first owner, even after it was passed on into other hands.

Click to view AGTA code.

Refractive Index 1.762-1.770
Hardness = 9 (Moh's Scale)
Specific Gravity =4.0
Species - Corundum
Optic Character - Double Refraction.
Phenomena - Asterism


Ultrasonic: Risky
Steamer: Risky
Heat: Poor; may alter color or star
Chemicals that harm: Boron


Crystal Structure
Black star crystal image.
Crystal system: Hexagonal (trigonal), dipyramidal, barrel and tabloid shape.

Sri Lanka, Thailand, India, Australia, Kampuchea
 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.

Oval black star sapphire.

Marquise cut black star sapphire image
Marquise black star sapphire.
Round black star sapphire image.
Round black star sapphire.

Oval shape blue star sapphire image
Oval blue star sapphire.
Round blue star sapphire image
Round blue star sapphire.
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