Gadolinium Gallium Garnet (GGG)
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Gadolinium Gallium Garnet (GGG) |
|---|---|---|
| 1 | Talc | |
| 2 | Gypsum | |
| 3 | Calcite | |
| 4 | Fluorite | |
| 5 | Apatite | |
| 6 | Orthoclase | |
| 7 | Quartz | |
| 8 | Topaz | |
| 9 | Corundum | |
| 10 | Diamond |
Crystal System
Value & Market
Where to Buy Gadolinium Gallium Garnet (GGG)
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About Gadolinium Gallium Garnet (GGG)
Gadolinium gallium garnet (GGG) is a synthetic oxide crystal grown by the Czochralski method, displaying a colorless to pale appearance with a high refractive index and strong dispersion approaching that of diamond. Developed initially for microwave device and magneto-optical applications in the 1960s and 70s, it was briefly marketed as a diamond simulant before being supplanted by cubic zirconia. Today GGG is used mainly in scientific and industrial optical components rather than as a gemstone.