Web Results

en.wikipedia.org/wiki/Sapphire

Sapphire is a gemstone, a variety of the mineral corundum, an aluminium .... absorb yellow-green light and result in deeper ruby red color with ... light which causes color for chromium and vanadium impurities, ...

www.thenaturalsapphirecompany.com/education/sapphire-colors-varieties/yellow-sapphires

Education customers about sapphire and jewelry.

www.thenaturalsapphirecompany.com/blog/yellow-sapphires-10-things-need-know-buy

Mar 30, 2015 ... The main causes of yellow coloration in sapphires is the trace element iron. In general, increased iron concentrations will produce higher color ...

www.webexhibits.org/causesofcolor/8.html

The intense blue of the sapphire is caused by the addition of titanium and iron ... Sapphires are described by their colors (blue, green, and yellow), with the most ...

www.ajsgem.com/gemstone-information/yellow-sapphire-57.html

Yellow sapphire's attractive color is just one reason for this gemstone's popularity . As with all sapphire, it's also extremely durable, having a hardness of 9 on the ...

www.gemselect.com/other-info/yellow-sapphire.php

Oct 17, 2007 ... The wide range of colors in corundum is caused by various impurities ... Among the fancy sapphires, yellow sapphire, colored by trace amounts ...

www.gia.edu/sapphire-quality-factor

The major fancy sapphire color categories are padparadscha, pink and purple, orange and yellow, green, and colorless and black. Each category has its own ...

www.gia.edu/gems-gemology/winter-1987-yellow-sapphire-nassau

The authors determined that there are actually seven types of "yellow" sapphire on the market today, which differ in the cause of color and the stability of the ...

nevada-outback-gems.com/Encyclopedia_pages/Gemstone_FAQ08.htm

What Causes Color In Gemstones: Amethyst, aquamarine, chrysoberyl, emerald, ruby, ... Fancy colored sapphires in green, yellow, orange and other shades are ...