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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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Pyrolusite from
Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy


06988840017272078177483.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
06154440017271985561407.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
03305990017271985594970.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
02700600017271985628734.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
06988840017272078177483.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
06154440017271985561407.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
02983810017364852589055.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
02700600017271985628734.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
06988840017272078177483.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
06154440017271985561407.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
03305990017271985594970.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
02700600017271985628734.jpg
Pyrolusite

Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
Locality type:Mine
Classification
Species:Pyrolusite
Formula:Mn4+O2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Siderite1
Data
Mineral Data:Click here to view Pyrolusite data
Locality Data:Click here to view Cape Bianco Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
Photo GalleryView Gallery (5 photos)
Data Identifiers
Mindat Occurrence Record ID:238341
Long-form Identifier:1:3:238341:5
GUID (UUID V4):0
Nearest other occurrences of Pyrolusite
6.2km (3.8 miles) ⓘRio Mine, Rio Marina, Rio, Livorno Province, Tuscany, Italy
8.9km (5.5 miles) ⓘFornacelle and Rio Albano Mines, Cavo, Rio Marina, Rio, Livorno Province, Tuscany, Italy
9.3km (5.8 miles) ⓘCape Pero, Cavo, Rio Marina, Rio, Livorno Province, Tuscany, Italy
34.4km (21.4 miles) ⓘMonte Valerio, Campiglia Marittima, Livorno Province, Tuscany, Italy
36.8km (22.9 miles) ⓘMontorsi iron ore prospects (Monte Spinosa-North; Monte Spinosa iron deposit), Campiglia Marittima, Livorno Province, Tuscany, Italy
58.9km (36.6 miles) ⓘCampese, Giglio Island, Isola del Giglio, Grosseto Province, Tuscany, Italy
68.9km (42.8 miles) ⓘPoggio Peloso, Civitella Paganico, Grosseto Province, Tuscany, Italy
75.5km (46.9 miles) ⓘPoggio Mortaio (Poggio Mortaio Mine; Monte Argentario Mine; Poggio delle Polveriere; Terra Rossa; Il Passo), Monte Argentario, Grosseto Province, Tuscany, Italy
80.3km (49.9 miles) ⓘBagni di Petriolo (Terme di Petriolo), Monticiano, Siena Province, Tuscany, Italy
84.9km (52.8 miles) ⓘVia della Sambuca U-V occurrence, Valle Benedetta, Livorno, Livorno Province, Tuscany, Italy
References
von Gorgey, R. (1907): Neue Mineralvorkommen aus Elba. Tscherm. Mineral. Petrogr. Mitt., 26: 335-340.
P. Roegner - (raggi X, EDS) Ratisbona Univ. - 1999-2001
 
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