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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. Gray is the ..... Gemstones: properties, identification and use.

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

In the gem trade, Sapphire without any color prefix refers to the blue variety of ... a different gemstone to identify the sapphire was misleading, and these names ... Some Sapphire gemstones may even be multicolored such as purple and blue.

www.gemselect.com/gem-info/gems-by-color.php

Jan 9, 2008 ... Pink sapphire is lovely but rare, especially in gems weighing over 1 carat. Rhodolite garnet tends to be purple-pink. Compared to other colors, ...

www.gemsociety.org/article/sapphire-buying-guide

Our sapphire buying guide can help you learn how sapphires are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough. ... The basic hues are red, orange, yellow, green, blue, violet, and purple. Tone refers to  ...

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.gemsociety.org/article/ruby-sapphire-identifying-origin-understanding-value-rarity-gem-corundum

This article covers in great detail the various geographic regions where Ruby and Sapphire are found, and considers rarity based on country of origin.

kamayojewelry.com/gemstone-colors/purple-gemstones-names

Though most popular in blue, sapphire also occurs as purple stones. This purple jewel comes from the mineral corundum, ...

www.gia.edu/sapphire-quality-factor

Sapphire is one of the Big 3 of jewelry colored gemstones—the other two are ruby ... Purple sapphires are similar in color but darker and always have purple as ...