Yttrium Aluminium 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.
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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
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| General Information | ||||||||||||||
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| Other Names/Trade Names: | ||||||||||||||
| Chemical Formula |
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| 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 Hardness | 8 to 8.5, Gemmological Tables (2004) | |||||||||||||
| Specific Gravity | 4.55, Gemmological Tables (2004) More from other references | |||||||||||||
| Optical Properties of Yttrium Aluminium Garnet | ||||||||||||||
| Refractive Index | 1.833, Gemmological Tables (2004) More from other references | |||||||||||||
| Optical Character | Isotropic, Gemmological Tables (2004) | |||||||||||||
| Colour | ||||||||||||||
| Colour (General) | Colourless, green, blue, yellow, yellow-green, red, pink, lilac, Gemmological Tables (2004) | |||||||||||||
| Colour (Chelsea Filter) | Strong red (chromium), Blue Chart Gem Identification (2010) | |||||||||||||
| Transparency | Transparent, Gemmological Tables (2004) | |||||||||||||
| Fluorescence & other light emissions | ||||||||||||||
| Fluorescence (General) | Colourless YAG: yellowish, Gemmological Tables (2004) | |||||||||||||
| Fluorescence (Long-Wave UV) | Inert to moderate orange, Blue Chart Gem Identification (2010) | |||||||||||||
| Crystallography of Yttrium Aluminium Garnet | ||||||||||||||
| Crystal System | Isometric, 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 | |||||||||||||