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Scolecite

Year of discovery: 1813 (World), 1933 (Japan)

Locality list: 39 localities of scolecite

• CaAl₂Si₃O₁₀,3H₂O
• [Ca²⁺][Al₂Si₃O₁₀]^2-,3H₂O

• Class: Natrolite group < Zeolite family
• Class: Tecto-Aluminosilicate - Zeolitic water
• Soluble in: HCl (Gel residue)
• Fluorescence: UV excitation (Some examples, Yellow)
• Electrical: Piezoelectric, Pyroelectric

• Ca => Na₂: Natrolite, Gonnardite, Paranatrolite
• Ca => Ba: Edingtonite

• Ca₃ => Ca₂Na₂: Mesolite

• 3H₂O => 6H₂O: Cowlesite

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

• Habit: Truncated long tabular
• Aggregate: Radial

• Cleavage: Perfect on {110} (2 planes)
• Hardness: 5-5.5
• Density: 2.3

• System: Monoclinic
• Group: m, Cc
• Lattice: a=18.5, b=19.0, c=6.5, β=90.6

Etymology: Skolex (Tapeworm) in Greek