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Stillwellite-(Ce)

Year of discovery: 1955 (Mary Kathleen mine, Australia), 1974 (Japan)

Locality list: A locality of stillwellite-(Ce)

• CeBSiO₅
• (Ce,La,Ca)BSiO₅
• [Ce³⁺][BSiO₅]^3-

• Class: Neso-Borosilicate
• Radioactive: Weak

• Color: Pale purple, Pale pink, Yellowish brown
• Streak: White
• Luster: Vitreous
• Diaphaneity: Translucent

• Cleavage: Imperfect
• Hardness: 6.5
• Density: 4.6

• System: Trigonal
• Group: 3, P3₁
• Lattice: a=6.8, c=6.7