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

In general, increased iron concentrations will increase color saturation. The trace element titanium causes an undesirable green cast in yellow sapphires, and ...

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.gia.edu/cs/Satellite?blobcol=gfile&blobheader=application%2Fpdf&blobheadername1=Content-Disposition&blobheadername2=MDT-Type&blobheadername3=Content-Type&blobheadervalue1=attachment%3B+filename%3DThe-Seven-Types-of-Yellow-Sapphire-and-Their-Stability-to-Light&blobheadervalue2=abinary%3B+charset%3DUTF-8&blobheadervalue3=application%2Funknown&blobkey=id&blobtable=GIA_DocumentFile&blobwhere=1355958458175&ssbinary=true

ally seven types of "yellow" sapphire on the market today, which differ in the cause of color and the stability of the color to light: type I -natural, light-stable.

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.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 ...

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 ...

yellowsapphire.org.in/history-and-general-information/yellow-sapphire-treatment-synthetic-sapphire

Almost a 60%-70% of the yellow sapphires sold in the market are heat-treated. ... Heat, High heat can cause change in color or clarity, and can damage or ...

www.naturallycolored.com/buying-guide/yellow-sapphire-vs-yellow-diamond

Yellow Sapphire VS Yellow Diamond. For one reason or another, you have your heart set on a yellow stone. Whether you're considering it for the center of your ...