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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Gypsum from
Spicchiaiola, Volterra, Pisa Province, Tuscany, Italy


Classification
Species:Gypsum
Formula:CaSO4 · 2H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Gypsum data
Locality Data:Click here to view Spicchiaiola, Volterra, Pisa Province, Tuscany, Italy
Data Identifiers
Mindat Occurrence Record ID:494609
Long-form Identifier:1:3:494609:0
GUID (UUID V4):0
Nearest other occurrences of Gypsum
7.2km (4.5 miles) ⓘCetine di Camporbiano Mine (Le Cetine; Cetine di Volterra; Cetine di Gambassi), Podere Giuseppe, Gambassi Terme, Metropolitan City of Florence, Tuscany, Italy
11.7km (7.3 miles) ⓘSaline di Volterra, Volterra, Pisa Province, Tuscany, Italy
11.8km (7.3 miles) ⓘLa Striscia, Il Castagno, Gambassi Terme, Metropolitan City of Florence, Tuscany, Italy
14.0km (8.7 miles) ⓘGambassi Quarry (Borgo alla Collina), Gambassi Terme, Metropolitan City of Florence, Tuscany, Italy
14.3km (8.9 miles) ⓘCastagno prospects (Migliarino and Forra prospects), Il Castagno, Gambassi Terme, Metropolitan City of Florence, Tuscany, Italy
16.9km (10.5 miles) ⓘLibbiano, Pomarance, Pisa Province, Tuscany, Italy
17.9km (11.1 miles) ⓘMicciano, Pomarance, Pisa Province, Tuscany, Italy
24.8km (15.4 miles) ⓘLe Cetine di Cotorniano mine, Chiusdino, Siena Province, Tuscany, Italy
26.4km (16.4 miles) ⓘPoggio Orlando mine, Lornano, Monteriggioni, Siena Province, Tuscany, Italy
26.4km (16.4 miles) ⓘLornano Mine, Lornano, Monteriggioni, Siena Province, Tuscany, Italy
References
Orlandi P., (2005). Geositi minerari e mineralogici della provincia di Pisa. In: La geologia della provincia di Pisa. Cartografia, geositi e banche dati, Provincia di Pisa, Italy, pp. 55-280.
 
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