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It is typically blue, but natural "fancy" sapphires also occur in yellow, purple, orange, and green colors; "parti sapphires" show two or more colors. The only color corundum stone that the term sapphire is not used for is red, which is called a ruby. [1] Pink colored corundum may be either classified as ruby or sapphire depending on locale.
Synthetic sapphire—also referred to as sapphire glass—is commonly used for small windows, because it is both highly transparent to wavelengths of light between 150 nm and 5500 nm (the visible spectrum extends about 380 nm to 750 nm [57]), and extraordinarily scratch-resistant. [58] [59] The key benefits of sapphire windows are:
The thieves unlocked a bathroom window during museum open hours, climbed in that night, and found that the sapphire was the only gem in the collection protected by an alarm—and the battery for that was dead. [6] The stones stolen were valued at more than $400,000.
The measurement of sales of popular music starts high relative to the wedding anniversary scale, concentrating on gold and platinum (see gold album).Likewise, credit card companies usually have a "gold card" and a "platinum card" (many formerly had a "silver card" then followed by a "gold card", but due to similarity in appearance between silver and platinum these were often discontinued with ...
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A rare type of sapphire, padparadscha sapphire, is pink-orange. The name "corundum" is derived from the Tamil - Dravidian word kurundam (ruby-sapphire) (appearing in Sanskrit as kuruvinda ). Because of corundum's hardness (pure corundum is defined to have 9.0 on the Mohs scale ), it can scratch almost all other minerals.
The Star of Asia is a large, 330 carats (66 g) cabochon-cut star sapphire now in the Smithsonian National Museum of Natural History. It is noted for its significant size and is considered to be one of the largest of its type. Adding to its aesthetic value are its rich blue colour and clear star, formed from three intersecting rutile striations.
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