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Also on display was the 563 carat (113 g) Star of India, the largest, and most famous, star sapphire in the world. It was discovered over 300 years ago in Sri Lanka, [citation needed] most likely in the sands of ancient river beds from where sapphires continue to be found today. It was donated to the museum by the financier J.P. Morgan.
Sapphire is one of the two gem-varieties of corundum, the other being ruby (defined as corundum in a shade of red). Although blue is the best-known sapphire color, it occurs in other colors, including gray and black, and also can be colorless. A pinkish orange variety of sapphire is called padparadscha.
Sapphire#Padparadscha From a merge : This is a redirect from a page that was merged into another page. This redirect was kept in order to preserve the edit history of this page after its content was merged into the content of the target page.
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). [8] [9] Because of corundum's hardness (pure corundum is defined to have 9.0 on the Mohs scale), it can scratch almost all other minerals.
It is primarily used to produce the ruby, sapphire and padparadscha varieties of corundum, as well as the diamond simulants rutile, strontium titanate and spinel. The principle of the process involves melting a finely powdered substance using an oxyhydrogen flame, and crystallising the melted droplets into a boule .
A drawing of the offshore bottlenose dolphin (top) and the new coastal species (bottom). From Lowcountry Marine Mammal Network on Facebook.
Padparadscha is perhaps more commonly accepted, but I am not so sure if it'd win a nomenclature comparison. 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.
The AP live video shot from Sderot has provided a rare independent glimpse of the situation in Gaza. Israel has long had a rocky relationship with Al Jazeera, accusing it of bias against the country.