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Chayesite

Year of discovery: 1987 (Moon Canyon, USA), 2020 (Japan)

Locality list: A locality of chayesite

• KMg₄FeSi₁₂O₃₀
• K(Mg,Fe²⁺)₄Fe³⁺(Si,Al)₁₂O₃₀
• [K⁺][]₂[Mg²⁺₄][Fe³⁺][(AlSi₅O₁₅)₂]^14-

• Class: Milarite group
• Class: Cyclo-Aluminosilicate (Double ring)

• Mg₄Fe => Fe: Osumilite
• Mg₄Fe => Mg: Osumilite-(Mg)

• Color: Blue, Brown
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Habit: Short prismatic

• Cleavage: No
• Hardness: 5-6
• Density: 2.7

• System: Hexagonal
• Group: 6/mmm, P6/mcc
• Lattice: a=10.2, c=14.4