| Friedelite | |
|---|---|
 | |
| General | |
| Category | Mineral |
| IMA symbol | Fdl[1] |
| Identification | |
| Mohs scale hardness | 4 - 5 |
| Streak | White |
Friedelite is a mineral[2] in the pyrosmalite group.[3] The mineral is named after Charles Friedel.
Name
The name friedelite is only for pure Mn end-member of the group pyrosmalite.[4]: 30
The mineral was named in 1876 by Emile Bertrand after Charles Friedel.[3]
Characteristics
Color
Its color can be pale pink, dark brownish red, red, brown, or orangish red. It is normally found in 1 to 5 carats[5] as well as nontransparent.[2]
Fluorescence
The mineral has a colorful luminescense under UV light.[2] With the fluorescence being red, but at rare times it has a green or yellow fluorescence.[6]
References
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- 1 2 3 "Friedelite". National Gem Lab. 2017-03-09. Retrieved 2021-10-12.
- 1 2 "Friedelite". www.mindat.org. Retrieved 2021-10-13.
- ↑ Brigatti, M. F.; Mottana, A. (2011-11-15). Layered Mineral Structures and their Application in Advanced Technologies. The Mineralogical Society of Great Britain and Ireland. ISBN 978-0-903056-29-8.
- ↑ "Friedelite Value, Price, and Jewelry Information". International Gem Society. Retrieved 2021-10-13.
- ↑ Schumann, Walter (2009). Gemstones of the World. Sterling Publishing Company, Inc. p. 56. ISBN 978-1-4027-6829-3.
| Micas |
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| Talcs |
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| Pyrophyllite series |
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| Kaolinites |
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| Serpentines |
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| Corrensites | |
| Smectites and vermiculite family |
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| Chlorites | |
| Allophanes |
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| Sepiolites |
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| Pyrosmalites |
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| Stilpnomelanes |
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