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Glaucochroite

Year of discovery: 1899 (Franklin mine, USA), 1991 (Japan)

Locality list: A locality of glaucochroite

• CaMnSiO₄

• [Ca²⁺][Mn²⁺][SiO₄]^4-

• Class: Monticellite group
• Class: Nesosilicate

• Mn => Mg: Monticellite
• Mn => Fe: Kirschsteinite
• Mn => Ca: Calcio-olivine

• CaMn => Zn₂: Willemite
• CaMn => Mg₂: Forsterite
• CaMn => Fe₂: Fayalite
• CaMn => Ni₂: Liebenbergite
• CaMn => Mn₂: Tephroite
• CaMn => Be₂: Phenakite
• CaMn => LiAl: Eucryptite

• Color: Bluish gray, Grayish brown
• Streak: White
• Luster: Vitreous
• Diaphaneity: Opaque

• Cleavage: Indistinct on {001} (1 plane)
• Hardness: 6
• Density: 3.4

• System: Orthorhombic
• Group: mmm, Pbnm
• Lattice: a=4.9, b=11.1, c=6.5