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Mineralpedia Details for Pyromorphite

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Pyromorphite

Pyromorphite

In reference to Pyromoprhite’s physical property of recrystallizing after melting, it is named for the Greek pyr, “fire” and morph, “form.” Found in hundreds of localities, Pyromorphite is a secondary mineral that forms in oxidized lead deposits, and can form, albeit rarely, as a volcanic sublimate. Pyromorphite can be piezoelectric, generate a charge in response to pressure, provided it is biaxial. Will needle occasionally fluoresce yellow-orange under long-wave and short-wave ultraviolet light. Pyromorphite occurs as crystals with a hexagonal outline, which are typically columnar or barrel-shaped. Also occurs as crusts or mammillary aggregates. Prominately green or yellow, but also brown, gray, orange, translucent. 

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

Formula
Pb5(PO4)3Cl 
Crystal System
Hexagonal 
Crystal Habit
Crystals short to long prismatic, acicular, often hoppered terminations, rarely tabular to equant; radiating to branching groups, tapering to a point. Commonly rounded, globular, reniform, botryoidal. 
Cleavage
On {1011}, interrupted 
Luster
Resinous to subadamantine 
Color
Dark grass-green, green, yellow, yellow-orange, reddish orange, yellow-brown, brown, tan, grayish, may be colorless 
Streak
White 
Geological Setting
A secondary mineral in the oxidized zone of lead deposits 
Class
Hexagonal, 6/m - Dipyramidal 
Fracture
Uneven to subconchoidal 
Hardness
3.5–4 
WebMineral
View Pyromorphite 
Mindat
View Pyromorphite 

Pyromorphite from Daoping Lead-Zinc mine, Gongcheng Co., Guangxi, China

Pyromorphite
            from Daoping Lead-Zinc mine, Gongcheng Co., Guangxi, China

Lime green barrel shaped crystals to 7mm.

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Pyromorphite from Hardshell mine, Santa Cruz Co., Arizona, United States

Pyromorphite
            from Hardshell mine, Santa Cruz Co., Arizona, United States

Greenish yellow 0.75 to 1mm curved or barrel-shaped crystals.

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Pyromorphite from Zeehan, Tasmania, Australia

Pyromorphite
            from Zeehan, Tasmania, Australia

Glassy light dark green prismatic crystals to 1mm.

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Pyromorphite from Touissit dist., Oujda-Angad prov., Oriental, Morocco

Pyromorphite
            from Touissit dist., Oujda-Angad prov., Oriental, Morocco

Barrel shaped brownish colored crystals to 6mm.

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Pyromorphite from St. Salvy, near Tarn, France

Pyromorphite
            from St. Salvy, near Tarn, France

Grass green acicular crystals in radial sprays to 6mm.

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Pyromorphite from Junction Mine, Broken Hill, New South Wales, Australia

Pyromorphite
            from Junction Mine, Broken Hill, New South Wales, Australia

Dark green barrel shaped crystals to 3mm with slightly lighter green terminations.

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Pyromorphite from Sehringen, Badenweiler, Black Forest, Baden-Württemberg, Germany

Pyromorphite
            from Sehringen, Badenweiler, Black Forest, Baden-Württemberg, Germany

Excellent, green to yellow hexagonal crystals to about 1mm.

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Pyromorphite from Penberthy Croft mine, St. Hilary, Cornwall, England

Pyromorphite
            from Penberthy Croft mine, St. Hilary, Cornwall, England

Bright green, acicular to tiny prismatic Pyromorphits crystals covering most of matrix.

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Pyromorphite from Barstows Trench, Roughton Gill, Caldbeck Fells, Cumbria, England

Pyromorphite
            from Barstows Trench, Roughton Gill, Caldbeck Fells, Cumbria, England

Lime green tapering hexagonal crystals, the largest to 1cm and averaging 3mm.

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Pyromorphite from Bwlch Glas mine, Talybont, Dyfed, Wales

Pyromorphite
            from Bwlch Glas mine, Talybont, Dyfed, Wales

Acicular, hexagonal crystals to mostly 3mm randomly oriented on Quartz matrix. The crystals are tapered to a point and some show hopperd growth habit.

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Pyromorphite from Susanna mine, Leadhills, Strathclyde, Scotland

Pyromorphite
            from Susanna mine, Leadhills, Strathclyde, Scotland

Bright yellow micro, acicular crystals of Pyromorphite covering Galena matrix with clear to white Cerussite crystals to 2mm.

Orange crystals of acucular Pyromorphite crystals to less than 1mm in clusters occupying every nook and cranny of this specimen. It is totally all Pyromorphite. 

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Pyromorphite from Gute Hoffnung mine, Mechernich, Eifel Mountains, Germany

Pyromorphite
            from Gute Hoffnung mine, Mechernich, Eifel Mountains, Germany

Bright green carpet of Pyromorphite clusters composed of tiny hexagonal crystals in radial growths.

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Pyromorphite from Vale of Towy, Carmarthen, Carmarthenshire, Wales

Pyromorphite
            from Vale of Towy, Carmarthen, Carmarthenshire, Wales

Specimen is covered with Pyromorphite from a smooth, melted-looking habit to well-defined individual, hexagonal crystals to 1mm. Some of the prismatic crystals are tipped with a second generation and slightly different color.

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Pyromorphite from Roughton Gill, Caldbeck Fells, Cumbria, England

Pyromorphite
            from Roughton Gill, Caldbeck Fells, Cumbria, England

Botryoidal crystals of Pyromorphite to 2mm showing at least three growth phases which have resulted in slightly different crystal habits from a rich yellow composed of individual prismated crystals to a light yellow and sugary to a smooth translucent yellow. 

Glistening botryoidal crystals lining vuggy Quartz matrix.

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Pyromorphite from Burgam mine, Stiperstones, Shropshire, England

Pyromorphite
            from Burgam mine, Stiperstones, Shropshire, England

Light green balled-up Pyromorphite crystals with overgrowths of darker green crystals and other areas with acicular grass green micro crystals.

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Pyromorphite from Penberthy Croft mine, St. Hilary, Cornwall, England

Pyromorphite
            from Penberthy Croft mine, St. Hilary, Cornwall, England

Bright green acicular Pyromorphite crystals to 1mm with good coverage throughout matrix.

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Pyromorphite from San Rafael mine, Nye Co., Nevada, United States

Pyromorphite
            from San Rafael mine, Nye Co., Nevada, United States

Lime green crystal aggregates with no particular forms to 2mm.

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Pyromorphite from Bunker Hill mine, Shoshone Co., Idaho, United States

Pyromorphite
            from Bunker Hill mine, Shoshone Co., Idaho, United States
Special Info
Phillips Collection

Nice, lustrous bright-orange Pyromorphite in curved crystals giving the piece a sparkly botryoidal look.

Also: greenish yellow, nice barrel-shaped crystals to 5mm i

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Pyromorphite from Broken Hill, New South Wales, Australia

Pyromorphite
            from Broken Hill, New South Wales, Australia

Vibrant yellowish green acicular and prismatic crystals with good coverage.

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Pyromorphite from Touissit dist., Oujda-Angad prov., Oriental, Morocco

Pyromorphite
            from Touissit dist., Oujda-Angad prov., Oriental, Morocco

Cluster of brownish Pyromorphite crystals to 4mm with a silvery luster and cream-colored terminated end.

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Pyromorphite from Burke, Shoshone Co., Idaho, United States

Pyromorphite
            from Burke, Shoshone Co., Idaho, United States

Barrel shaped grrenish-yellow crystals to 1cm.

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Pyromorphite from Black Pine mine, Philipsburg, Granite Co., Montana, United States

Pyromorphite
            from Black Pine mine, Philipsburg, Granite Co., Montana, United States

Colorless acicular Pyromorphite crystals to 3mm. Good locality specimen.

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Pyromorphite from Kintore Opencut, Broken Hill, New South Wales, Australia

Pyromorphite
            from Kintore Opencut, Broken Hill, New South Wales, Australia

Yellow micro crystals to about 0.5mm across face.

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Pyromorphite from Driggith mine, Caldbeck Fells, Cumbria, England

Pyromorphite
            from Driggith mine, Caldbeck Fells, Cumbria, England

Green barrel-shaped crystals to 2mm.

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Pyromorphite from Correze mine, La Farges, France

Pyromorphite
            from Correze mine, La Farges, France

Greenish prismatic crystals with yellow tips to 4mm.

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Pyromorphite from Wheatley mine, Chester Co., Pennsylvania, United States

Pyromorphite
            from Wheatley mine, Chester Co., Pennsylvania, United States

Grass green prismatic crystals to 5mm. 

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Pyromorphite from Friedrichssegen mine, Bad Ems, Rhineland-Palatinate, Germany

Pyromorphite
            from Friedrichssegen mine, Bad Ems, Rhineland-Palatinate, Germany

Lustrous tan Pyromporphite crystals to 5mm. Good coverage in the many voids and crevices of this cabinet specimen.

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