Friedelite

Friedelite is a mineral^[2] in the pyrosmalite group.^[3] The mineral is named after Charles Friedel.

Friedelite
General
Category	Mineral
IMA symbol	Fdl[1]
Identification
Mohs scale hardness	4 - 5
Streak	White

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

1. 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.
2. "Friedelite". National Gem Lab. 2017-03-09. Retrieved 2021-10-12.
3. "Friedelite". www.mindat.org. Retrieved 2021-10-13.
4. 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.
5. "Friedelite Value, Price, and Jewelry Information". International Gem Society. Retrieved 2021-10-13.
6. Schumann, Walter (2009). Gemstones of the World. Sterling Publishing Company, Inc. p. 56. ISBN 978-1-4027-6829-3.