Yttrium Aluminium Garnet

Big Photo

Square YAG
2.45 carats
© Rarestone.com

YAG is a synthetic gemstone. Green YAG produced by method of Pulling has been used to imitate emerald and tsavorite garnet.

Yttrium Aluminium Garnet Gemstones by Colour

This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
 
 
 

Yttrium Aluminium Garnet Gemstones by Size

This table shows distribution of Yttrium Aluminium Garnet gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:2.45 cts
Heaviest:15.57 cts
Average:9.48 cts
Total photos:3
Do you have a larger Yttrium Aluminium Garnet? Why not upload a photo?
2.45ct to 3.76ct3.76ct to 5.07ct5.07ct to 6.39ct6.39ct to 7.70ct7.70ct to 9.01ct9.01ct to 10.32ct10.32ct to 11.63ct11.63ct to 12.95ct12.95ct to 14.26ct14.26ct to 15.57ct
General Information
Other Names/Trade Names:
Chemical Formula
Y
 
3
Al
 
5
O
 
12
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Synthetic Yttrium Aluminium Garnet
Flux: may show (lines of) tiny grains, "feathers". Pulled: may show subtly curved striae - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 2
Physical Properties of Yttrium Aluminium Garnet
Mohs Hardness8 to 8.5
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Specific Gravity4.55
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Optical Properties of Yttrium Aluminium Garnet
Refractive Index1.833
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
More from other references
Optical CharacterIsotropic
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Colour
Colour (General)Colourless, green, blue, yellow, yellow-green, red, pink, lilac
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Colour (Chelsea Filter)Strong red (chromium)
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
TransparencyTransparent
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Fluorescence & other light emissions
Fluorescence (General)Colourless YAG: yellowish
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Fluorescence (Long-Wave UV)Inert to moderate orange
Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Crystallography of Yttrium Aluminium Garnet
Crystal SystemIsometric
Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)
Inclusions in Yttrium Aluminium Garnet
Occasionally gas bubbles and curved growth lines - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 28
Further Information
Mineral information:Yttrium Aluminium Garnet information at mindat.org
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