| General Information |
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| Chemical Formula | Arthur Thomas, Gemstones (2009) |
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| Physical Properties of Pyromorphite |
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| Mohs Hardness | 3.5 to 4Arthur Thomas, Gemstones (2009) |
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| Specific Gravity | 6.5 to 7.1Arthur Thomas, Gemstones (2009) |
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| Tenacity | BrittleArthur Thomas, Gemstones (2009) |
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| Cleavage Quality | ImperfectArthur Thomas, Gemstones (2009) |
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| Fracture | Uneven,Sub-ConchoidalAnthony et al, Handbook of mineralogy (2001) More from other references |
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| Optical Properties of Pyromorphite |
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| Refractive Index | 2.042 to 2.059Arthur Thomas, Gemstones (2009) |
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| Optical Character | UniaxialAnthony et al, Handbook of mineralogy (2001) More from other references |
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| Birefringence | 0.010Arthur Thomas, Gemstones (2009) |
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| Pleochroism | WeakAnthony et al, Handbook of mineralogy (2001) |
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| Colour |
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| Colour (General) | Dark grass-green, green, yellow, yellow-orange, reddish orange, yellow-brown, brown, tan, grayish, may be colorless; colorless or nearly so in transmitted light.Anthony et al, Handbook of mineralogy (2001) More from other references |
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| Transparency | Transparent,TranslucentArthur Thomas, Gemstones (2009) |
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| Lustre | Subadamantine,ResinousAnthony et al, Handbook of mineralogy (2001) More from other references |
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| Crystallography of Pyromorphite |
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| Crystal System | HexagonalAnthony et al, Handbook of mineralogy (2001) More from other references |
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| Habit | Crystals short to long prismatic, may be acicular, hoppered terminations typical, to 8 cm, rarely tabular to equant; radiating to branching groups, tapering to a point. Commonly rounded, globular, reniform, botryoidal.Anthony et al, Handbook of mineralogy (2001) More from other references |
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| Geological Environment |
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| Where found: | A secondary mineral in the oxidized zone of lead deposits; rarely a volcanic sublimate.Anthony et al, Handbook of mineralogy (2001) |
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| Further Information |
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| Mineral information: | Pyromorphite information at mindat.org |
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