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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Diopside from
Titignano, Orvieto, Terni Province, Umbria, Italy


Classification
Species:Diopside
Formula:CaMgSi2O6
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Diopside data
Locality Data:Click here to view Titignano, Orvieto, Terni Province, Umbria, Italy
Data Identifiers
Mindat Occurrence Record ID:306384
Long-form Identifier:1:3:306384:2
GUID (UUID V4):0
Nearest other occurrences of Diopside
11.9km (7.4 miles) ⓘVispi Quarry, San Venanzo, Terni Province, Umbria, Italy
12.4km (7.7 miles) ⓘSan Venanzo Volcano, San Venanzo, Terni Province, Umbria, Italy
31.6km (19.6 miles) ⓘColle Fabbri, Spoleto, Perugia Province, Umbria, Italy
33.0km (20.5 miles) ⓘMontefiascone caldera, Montefiascone, Viterbo Province, Lazio, Italy
46.3km (28.8 miles) ⓘMonte di Cellere, Cellere, Viterbo Province, Lazio, Italy
47.3km (29.4 miles) ⓘCase Collina, Pitigliano, Grosseto Province, Tuscany, Italy
49.2km (30.6 miles) ⓘPian di San Martino, Vetralla, Viterbo Province, Lazio, Italy
64.9km (40.4 miles) ⓘCupaello Quarry, Santa Rufina, Rieti, Rieti Province, Lazio, Italy
65.4km (40.6 miles) ⓘSH2 deep well, Bracciano, Metropolitan City of Rome Capital, Lazio, Italy
69.7km (43.3 miles) ⓘFicoreto carbonatite, Campagnano di Roma, Metropolitan City of Rome Capital, Lazio, Italy
References
Stoppa, Francesco, Liu, Yu (1995) Chemical composition and petrogenetic implications of apatites from some ultra-alkaline Italian rocks. European Journal of Mineralogy, 7 (2) 391-402 doi:10.1127/ejm/7/2/0391
 
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