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Name: |
piemontite (piedmontite) |
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Class: |
Silicates |
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Chemistry: |
Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH) |
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Color(s): |
red, brown-rd, reddish-black, black |
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Hardness: |
6-6.5 |
SpecGrav: |
3.4-3.5 |
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Fracture: |
Cleavage: |
good |
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Crystal: |
monoclinic; prismatic, acicular |
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Envronment: |
found in manganese deposits, and shists |
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Association: |
quartz, glaucophane, braunite, rhodonite, rhodochrosite |
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Locals: |
Italy / NM., USA / France / Egypt / Scotland / Sweden / |
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Misc: |
named from locality of Piedmont, Italy |
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Photos |
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1.) Pilar Cliffs, Taos Co., New Mexico |
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