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Cowlesite

Year of discovery: 1975 (Monte Lake, Canada, Superior area, USA, Neer Road, USA, and Beech Creek quarry, USA), 1977 (Japan)

Locality list: 4 localities of cowlesite

• CaAl₂Si₃O₁₀,6H₂O
• [Ca²⁺][Al₂Si₃O₁₀]^2-,6H₂O

• Class: Natrolite group < Zeolite family
• Class: Tecto-Aluminosilicate - Zeolitic water

• Ca => Na: Natrolite, Gonnardite, Paranatrolite
• Ca => Ba: Edingtonite

• Ca₃ => Na₂Ca₂: Mesolite

• 6H₂O => 3H₂O: Scolecite

• Color: Colorless, White
• Streak: White
• Luster: Vitreous
• Diaphaneity: Transparent

• Aggregate: Globular

• Cleavage: Perfect on {010} (1 planes)
• Hardness: 5-5.5
• Density: 2.1

• System: Orthorhombic
• Group: P222₁, Pmmm, Pmm2
• Lattice: a=11.3, b=15.3, c=12.6