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Mineralpedia Details for Descloizite

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Descloizite

Descloizite

Named after Alfred Lewis Oliver Legrand Des Cloizeaux (1817-1897), a Professor of Mineralogy at the University of Paris in France who was the first to describe the mineral. Occurs widespread in the oxidation zone of hydrothermal ore deposits rich in lead and zinc. Crystals often as flaming orange red drusy crusts and micro thin platy crystals. Can occur in beautiful dark chocolate plumose aggregates with dipyramidal crystals in the centimeter range.

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

Formula
PbZnVO4(OH) 
Crystal System
Orthorhombic 
Crystal Habit
Plumose, Tabular, Encrustations 
Cleavage
None, None, None 
Luster
Greasy (Oily) 
Color
dark brownish black, dark reddish brown, orange red, reddish brown, black 
Streak
light brownish green 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
3.5 
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Descloizite from Grey Horse mine, Pinal Co., Arizona, United States

Descloizite
            from Grey Horse mine, Pinal Co., Arizona, United States

Root beer colored micro crystals to 0.75mm.

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Descloizite from C&B mine, Gila Co., Arizona, United States

Descloizite
            from C&B mine, Gila Co., Arizona, United States

Micro platy rosettes of Descloizite crystals to 0.5mm.

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Descloizite from Richmond Sitting Bull mine, Galena, Lawrence Co., South Dakota, United States

Descloizite
            from Richmond Sitting Bull mine, Galena, Lawrence Co., South Dakota, United States

Beautiful rosettes of this tabular Descloizite cystals to 1mm.

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Descloizite from Commercial Cramer mine, Grant Co., New Mexico, United States

Descloizite
            from Commercial Cramer mine, Grant Co., New Mexico, United States

Bright orange rosettes of descloizite to less than 0.7mm.

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