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The archetypal asteria is the star sapphire, generally corundum with near uniform impurities which is bluish-grey and milky or opalescent, which when lit has a star of six rays. In the red instance stellate reflection is rarer; the star- ruby occasionally found with the star-sapphire in Sri Lanka is among the most valued of "fancy stones".
A star sapphire is a type of sapphire that exhibits a star-like phenomenon known as asterism; red stones are known as "star rubies". Star sapphires contain intersecting needle-like inclusions following the underlying crystal structure that causes the appearance of a six-rayed "star"-shaped pattern when viewed with a single overhead light source.
In any case.. I want to list it for merging with Sapphire. Gem-fanat 17:15, 13 September 2007 (UTC) Padparadscha should certainly be moved to the Sapphire section. Yogo sapphires are just as (or perhaps more) rare and expensive and they haven't received their own page. Why should one color be favored over others with it's own page?
In modern use, the precious stones are emerald, ruby, sapphire and diamond, with all other gemstones being semi-precious. [9] This distinction reflects the rarity of the respective stones in ancient times, as well as their quality: all are translucent , with fine color in their purest forms (except for the colorless diamond), and very hard with ...
A widespread legend among the tribes is that the stone gets its color from the flesh and blood of their ancestors." Bass Island Brownstone Company Quarry, in Lake Superior, near La Pointe, WI, NRHP-listed. Source of brownstone for buildings in Chicago, IL and Milwaukee, WI; Walczak-Wontor Quarry Pit Workshop, near Cataract, Wisconsin, NRHP ...
Corundum is a crystalline form of aluminium oxide (Al 2 O 3) typically containing traces of iron, titanium, vanadium, and chromium. [3] [4] It is a rock-forming mineral.It is a naturally transparent material, but can have different colors depending on the presence of transition metal impurities in its crystalline structure. [7]
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