Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Fibroferrite from
Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy


05253870017368550689914.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
06769630017272002512116.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
03532460017272002535083.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
07467610017272002545339.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
01095990017363691824188.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
06769630017272002512116.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
03266580017368550697828.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
06209310017368550695527.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
01842370017367033141380.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
06769630017272002512116.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
03532460017272002535083.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
07467610017272002545339.jpg
Fibroferrite

Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
Locality type:Mine
Classification
Species:Fibroferrite
Formula:Fe3+(SO4)(OH) · 5H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Pickeringite2
Sideronatrite1
Data
Mineral Data:Click here to view Fibroferrite data
Locality Data:Click here to view Le Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
Photo GalleryView Gallery (9 photos)
Data Identifiers
Mindat Occurrence Record ID:84183
Long-form Identifier:1:3:84183:2
GUID (UUID V4):0
Nearest other occurrences of Fibroferrite
24.7km (15.3 miles) ⓘNiccioleta Mine, Massa Marittima, Grosseto Province, Tuscany, Italy
32.0km (19.9 miles) ⓘFenice Capanne Mine, Massa Marittima, Grosseto Province, Tuscany, Italy
75.4km (46.9 miles) ⓘVigneria stope, Rio Mine, Rio Marina, Rio, Livorno Province, Tuscany, Italy
78.2km (48.6 miles) ⓘCape Arco Mine, Rio Marina, Rio, Livorno Province, Tuscany, Italy
84.6km (52.6 miles) ⓘCape Calamita Mine, Capoliveri, Livorno Province, Tuscany, Italy
References
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
Sabelli, Cesare, Brizzi, Giancarlo (1984) Alteration Minerals of the Cetine Mine, Tuscany, Italy. The Mineralogical Record, 15 (1) 27-36
Lombardo, Mariasole (2010) Fibroferrite: crystallographic, optical and synthesis experiments. MsC Thesis, Queens University, Ontario, Canada
Menchetti, S., Batoni, M., Batacchi, C., Borselli, G., Brogi, A., Ceccantini, L., Fassina, B., Marchesini, M., Rossellini, A. & Ruggieri, G. (2015): Le Cetine di Cotorniano. Miniera e minerali. Associazione Micro-Mineralogica Italiana, Cremona, 354 p.
 
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