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Natural Star Sapphire

Sapphires that display asterism are known as "stars" in the trade. They may occur in almost any color. The star is a result of the light reflecting of off of the silky crystallizations of rutile inside the stone.


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Star Sapphire Profile

Color information: Blue, green blue, violet, blue, black, brown, pink.
Refractive Index: 1.759-1.778
Chemical Composition: AL2O3
Hardness: 9
Density: 4.00
Crystal Group: Hexagonal
Ocurrence: Sri Lanka, Burma, India, East Africa, Ankarana-Madagascar, Thailand.
Sign of the Zodiac: N/A
Month of the year: N/A
Star Sapphire Star Sapphire
Madagascar star sapphires from Ankarana frequently display excellent asterism. Our photographs are taken with a fiber optic light above the stone. The stars will look like this in sunlight or under a spotlight. The denim blue color of Madagascar Star Sapphires can be quite even except for the crystal growth lines which prove that the stone is natural.

A great stone for a man's or women's ring, natural star sapphires are never clean. It is the silk inside them that accounts for the asterism and clean stars do not exist.

In terms of price and quality, blue star sapphires from Madagascar are incomparable in value. Ceylon and Burma both produce limited quantities of blue stars but although they may occasionally be better in quality, their prices are normally substantially higher.

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Emerald Single Cushion Moderately included
Size: 8.30 X 8.50 MM
Weight: 2.810 CTS
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Today’s Trade/
Best Selling Gems:
Sapphire Sapphire
656 Sapphire ’s available
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267 Spinel ’s available
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182 Tanzanite ’s available
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273 Alexandrite ’s available
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Zircon Zircon
276 Zircon ’s available
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Gemstone Variety: Hits Index
Going Down Sapphire -1683 -0.1%
average price USD 363.69 per item
Going Up Alexandrite +1025 +0.1%
average price USD 1999.28 per item
Going Up Tsavorite +1434 +0.1%
average price USD 189.52 per item
Going Down Spinel -352 +-0.0%
average price USD 640.29 per item
Going Down Diamond -557 -0.1%
average price USD 5123.43 per item
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