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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 ... Blue sapphires with up to 15% violet or purple are generally said to be of fine quality. ..... Neal; The production and identification of artificial precious stones in Annual Report of the Board of Regents of the Smithsonian Institution, ...

www.thenaturalsapphirecompany.com/blog/purple-sapphires-tips-for-buying-the-perfect-purple-engagement-ring

Apr 13, 2015 ... Purple Sapphires are the least well known sapphire varieties and the ... Take A Look At Our Identification Chart For Indications Of Treatments ...

www.minerals.net/gemstone/sapphire_gemstone.aspx

For example, green Sapphire was called "Oriental Emerald". The practice of applying the name of a different gemstone to identify the sapphire was misleading, ...

www.gemsociety.org/article/sapphire-jewelry-and-gemstone-information

Everything you ever wanted to know about sapphire gems. ... Colorless, white, gray, blue, blue-green, green, violet, purple, orange, yellow, yellow-green, .... See our article on identifying the origins of corundum gemstones for more information.

www.leaf.tv/articles/difference-between-purple-sapphire-amethyst

Sapphire, a member of the corundum family of gems, exhibits a broad color range. Impurities in clear corundum tint the naturally colorless stone yellow, green, ...

www.gemdat.org/gem-3529.html

In antiquity, any blue stone such as lazurite, was called Sapphire. .... orange, red- orangy, orangy-pink, pink-purple, hot pink, and padparadscha colour are beryllium treated. ... Herve Nicolas Lazzarelli, Blue Chart Gem Identification ( 2010).

jupitergem.com/gemstones/purple-sapphire

These precious stones can dazzle onlookers as they have the ability to naturally change color as lighting ... Identification: Natural Unheated Purple Sapphire.

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

Dec 23, 2006 ... Read about sapphire gems and jewelry at Gemselect. ... color-specific names, such as yellow sapphire, green sapphire or purple sapphire. ... Identifying Sapphire; Sapphire Origin; Buying Sapphire; Sapphire Gemological ...

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

Nov 29, 2013 ... Color Change Sapphire Gem Information, learn about color change sapphire ... Typically, most color change sapphire shifts from blue under natural daylight to a violet-purple ... Identifying Color Change Sapphire Back to Top.

www.gia.edu/sapphire-quality-factor

Sapphire is one of the Big 3 of jewelry colored gemstones—the other two are ruby ... Pink sapphires range from red to purple with weak to vivid color saturation  ...