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Ei, vaan se on korundia eli alumiinioksidia.
Actually it's corundum. That's an aluminum oxide.
- Sininen korundi.
Blue corundum.
- Tarkalleen ottaen sininen korundi.
Blue corundum, to be precise.
Se on trigonisen kidejärjestelmän korundi heksagonisessa symmetriajärjestelmässä.
It's a corundum in the trigonal crystal system, in the hexagonal scalenohedral class.
Sininen korundi.
Blue corundum.