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Caledonite

Year of discovery: 1832 (Leadhills, UK), 1932 (Japan)

Locality list: 8 localities of caledonite

• Cu₂Pb₅(SO₄)₃(CO₃)(OH)₆
• [Cu²⁺₂][Pb²⁺₅][(OH)₆|CO₃|(SO₄)₃]^14-

• Class: Sulfate -Carbonate - Hydroxide
• Soluble in: HNO₃ (with bubbles)
• Electrical: Piezoelectric
• Alter to Cerussite.
• Substitution pseudomorph: Replaced by Cerussite.

• Color: Dark blue, Bluish green
• Streak: Pale blue
• Luster: Vitreous
• Diaphaneity: Transparent-Translucent

• Cleavage: Perfect on {010} (1 planes), Distinct on {100} (1 plane)
• Hardness: 2-2.5
• Density: 5.8

• System: Orthorhombic
• Group: mm2, Pmn2₁
• Lattice: a=20.1, b=7.1, c=6.6