Mineralpedia Details for Friedelite
Friedelite
Named after Charles Friedel, a noted French chemist and mineralogist. Friedelite is found in metamorphosed Mn-Fe deposits in localities in France, Sweden, Kazakhstan, the United States, South Africa, Australia, and others. Associated minerals include rhodochrosite, albandite, franklinite, willemite, calcite, baryte, chlorite, sphalerite, kutnohorite, andradite, and hausmannite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/friedelite.pdf
- Formula
- Mn2+8Si6O15(OH)10
- Crystal System
- Monoclinic
- Crystal Habit
- Massive, Tabular
- Cleavage
- Perfect, None, None
- Luster
- Vitreous (Glassy)
- Color
- brown, brown red, yellow, light pink, dark red
- Streak
- pink
- Class
- Monoclinic - Prismatic
- Fracture
- Brittle - Uneven
- Hardness
- 4-5
- WebMineral
- View Friedelite
- Mindat
- View Friedelite
Friedelite from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States
Peach colored micro crystals mostly less than 0.5mm but up to 1mm.
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Friedelite from Franklin, Sussex Co., New Jersey, United States
Extensively rich specimen with thousands of pink micro crystals with characteristic triangular faces. Not fluorescent.
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Friedelite from N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa
Tiny deep red spherules, less than 0.5mm.
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