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Mineralpedia Details for Caledonite

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Caledonite

Caledonite

Named after the ancient Latin/Roman term for the Highlands of Scotland, Caledonia, which is where the first known locality lies at the Leadhills in Strathclyde (Lanarkshire). Caledonite is an uncommon mineral that occurs as a secondary mineral in oxidized copper-lead deposits. Additional localities for Caledonite include in England, Russia, Iran, the United States, Chile, Australia, and several others. Associated minerals include cerussite, anglesite, leadhillite, brochantite, linarite, azurite, and malachite. Caledonite is piezoelectric and generates a charge in response to pressure.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/caledonite.pdf

Formula
Cu2Pb5(SO4)3(CO3)(OH)6 
Crystal System
Orthorhombic 
Crystal Habit
Prismatic, Radial, Striated 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Greasy 
Color
blue, blue green, green, dark green 
Streak
greenish white 
Class
Orthorhombic - Pyramidal 
Fracture
Uneven 
Hardness
2.5-3 
WebMineral
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Mindat
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Caledonite from Rožná dep., Vysočina, Moravia, Czech Republic

Caledonite
            from Rožná dep., Vysočina, Moravia, Czech Republic 3mm crystal.
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Caledonite from Reward mine, Inyo Co., California, United States

Caledonite
            from Reward mine, Inyo Co., California, United States

Aqua-blue, lustrous, well-formed crystals of Caledonite to 1mm associated with 0.5mm waxy looking Chlorargyrite crystals.

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Caledonite from Anarak dist., Esfahan, Iran

Caledonite
            from Anarak dist., Esfahan, Iran

Lustrous blue, striated crystals to 1mm throughout matrix with perhaps darker blue Linarite or Diaboleite. Not too many minerals on the market from Iran.

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Caledonite from Brown Monster mine, Inyo Co., California, United States

Caledonite
            from Brown Monster mine, Inyo Co., California, United States

A single, gorgeous 2mm striated Caledonited crystal in predominately Leadhillite matrix. The Leadhillite is mostly massive, but can be seen in the photos only as light-reflected plates. Also in association is yelow Oxyplumboromeite.

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