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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Actinolite from
Cala Moresca, Monte Argentario, Grosseto Province, Tuscany, Italy


Classification
Species:Actinolite
Formula:◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Actinolite data
Locality Data:Click here to view Cala Moresca, Monte Argentario, Grosseto Province, Tuscany, Italy
Data Identifiers
Mindat Occurrence Record ID:941675
Long-form Identifier:1:3:941675:8
GUID (UUID V4):0
Nearest other occurrences of Actinolite
1.6km (1.0 miles) ⓘCala Grande, Monte Argentario, Grosseto Province, Tuscany, Italy
65.2km (40.5 miles) ⓘSassi Neri mine, Capoliveri, Livorno Province, Tuscany, Italy
67.9km (42.2 miles) ⓘTerranera Mine, Porto Azzurro, Livorno Province, Tuscany, Italy
69.1km (42.9 miles) ⓘPorticciolo, Rio Marina, Rio, Livorno Province, Tuscany, Italy
71.2km (44.2 miles) ⓘCretaio, Prata, Massa Marittima, Grosseto Province, Tuscany, Italy
82.6km (51.4 miles) ⓘTemperino Mine, Campiglia Marittima, Livorno Province, Tuscany, Italy
83.2km (51.7 miles) ⓘBotro ai Marmi, Campiglia Marittima, Livorno Province, Tuscany, Italy
83.8km (52.1 miles) ⓘMontorsi Mine, Botro ai Marmi, Campiglia Marittima, Livorno Province, Tuscany, Italy
99.8km (62.0 miles) ⓘMicciano, Pomarance, Pisa Province, Tuscany, Italy
References
Azzaro E., Caravani L., Di Sabatino B., Negretti G. (1977): Aspetti petrologici delle rocce verdi del Promontorio Argentario (Toscana). Rend. Soc. Ital. Miner. Petrol., 33, 689-698.
Reinhardt J., Rossetti F. (2004): Monte Argentario and Isola del Giglio (Southern Tuscany, Italy): a record from continental break-up to subduction, orogenic wedge formation, and post-orogenic extension. 32nd International Geological Congress (IGC), Florence, August 20-28, 2004. Post-Congress P61. Field Trip Guide Book - P61, 19 pp.
 
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