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en.wikipedia.org/wiki/Sapphire

Sapphire is a gemstone, a variety of the mineral corundum, an aluminium oxide It is typically ... Gray is the normal saturation modifier or mask found in blue sapphires. ..... Thin sapphire wafers were the first successful use of an insulating substrate upon which to deposit silicon to make the integrated circuits known as silicon ...

minerals.usgs.gov/minerals/pubs/commodity/gemstones/sp14-95/sapphires.html

Dec 30, 2016 ... The production of gem-quality sapphires in the United States is not new or recent. In 1865, the first U.S. sapphires were found in the gravels of ...

gemgallery.com/montana-sapphire-history

Fancy colored Montana Sapphires, heat-treated. Sapphires were first found in Montana in 1865 by early gold prospectors mining the Missouri river near Helena .

www.newworldencyclopedia.org/entry/Sapphire

Aug 19, 2015 ... Blue sapphires were first discovered in the Padar region of Kashmir in the 1880s. Kashmir stones were usually of exceptionally fine quality.

www.birthdaygems.org/history-of-birthstones/history-of-sapphires.htm

The Sapphire is one of the earliest gems known to man, Sapphires are found in ... attributed to Sapphires were that they preserved Chastity, discovered Fraud ...

www.gemselect.com/gem-info/sapphire/sapphire-info.php

Dec 23, 2006 ... Sapphire is found in only a few locations in the world. ... The rare, fine blue sapphires of Pailin, Cambodia were also very highly regarded .... It was first sold by Sotheby's in 1988 for $2.82 million and then sold by Christie's in ...

www.australiansapphire.com/history.htm

One of the first reports is from 1851 when sapphire was recovered during gold ... of New South Wales and in 1875 Sapphire was discovered in Retreat Creek, ...

www.ruby-sapphire.com/r-s-bk-india.htm

Mar 7, 2013 ... T.D. La Touche is dispatched to the mines to undertake the first .... Exactly when sapphires were first discovered in Kashmir is unknown.

www.langantiques.com/university/Sapphire

Traders from the east returned with first hand stories of far away countries with ... New sapphire deposits in Australia, the USA, and India were discovered and ...