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Kornerupine [abbr. Krn ]

Year of discovery: 1884 (Fiskenæsset old harbour, Greenland), 1944 (Japan)

Locality list: A locality of kornerupine

• Mg₃Al₆Si₅O₂₁(OH)
• (Mg,Fe,Al)₃Al₆(Si,Al,B)₅O₂₁(OH,F)
• [Mg²⁺₃][Al³⁺₆][OH|O₄|Si₂O₇|Si₃O₁₀]

• Class: Kornerupine group
• Class: Sorosilicate - Oxide - Hydroxide

• Al₂Si => Mg₂B: Prismatine (Series)

• Color: Yellowish brown, Green, Colorless
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent-Opaque

• Cleavage: Indistinct on {110} (2 planes)
• Hardness: 7
• Density: 3.3

• System: Orthorhombic
• Group: mmm, Cmcm
• Lattice: a=16.0, b=13.7, c=6.7