Difference between revisions of "Star sapphire"
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A '''star sapphire''' is a [[sapphire]] with an inclusion of [[asterism]], very small [[mineral]] deposits of [[rutile]] (titanium dioxide) that naturally form within the sapphire to create rays (up to six) that reflect light, a white appearance on an otherwise blue-colored [[gemstone]]. | A '''star sapphire''' is a [[sapphire]] with an inclusion of [[asterism]], very small [[mineral]] deposits of [[rutile]] (titanium dioxide) that naturally form within the sapphire to create rays (up to six) that reflect light, a white appearance on an otherwise blue-colored [[gemstone]]. | ||
| − | The Star of India, the largest known star sapphire in the world, weighs 563.35 [[carats]] (112.67 grams). It is almost flawless in appearance, and even has star rays on both sides of the gemstone. | + | The Star of India, the largest known star sapphire in the world, weighs 563.35 [[carats]] (112.67 grams).<ref>[http://amnh.org/museum/tourplan/images/gallery/lg/star_india.jpg Picture of the Star of India]</ref> It is almost flawless in appearance, and even has star rays on both sides of the gemstone. |
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| + | ==References== | ||
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| + | <references /> | ||
[[category: Gems]] | [[category: Gems]] | ||
Revision as of 17:09, December 5, 2008
A star sapphire is a sapphire with an inclusion of asterism, very small mineral deposits of rutile (titanium dioxide) that naturally form within the sapphire to create rays (up to six) that reflect light, a white appearance on an otherwise blue-colored gemstone.
The Star of India, the largest known star sapphire in the world, weighs 563.35 carats (112.67 grams).[1] It is almost flawless in appearance, and even has star rays on both sides of the gemstone.
