Kornerupine
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Physical & Optical Properties
Mohs Hardness
| Mohs | Reference mineral | Kornerupine |
|---|---|---|
| 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 Kornerupine
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About Kornerupine
Kornerupine is a rare magnesium iron aluminum borosilicate mineral occurring in green, brown, yellow, and colorless transparent prismatic crystals with strong trichroism displaying yellow-brown, green, and sometimes red tones. It was first described in 1884 from Greenland and named after Danish geologist Andreas N. Kornerup, with gem-quality material sourced from Sri Lanka, Madagascar, Tanzania, Myanmar, and Canada. The finest green and cat's-eye varieties are prized by collectors and connoisseurs for their rarity and pleochroic color change.