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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Rhodesite from
Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy


Locality type:Quarry
Classification
Species:Rhodesite
Formula:KHCa2Si8O19 · 5H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Rhodesite data
Locality Data:Click here to view Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
Data Identifiers
Mindat Occurrence Record ID:323254
Long-form Identifier:1:3:323254:5
GUID (UUID V4):0
References
Stoppa, F., Sharygin, V. V., Cundari, A. (1997) New mineral data from the kamafugite-carbonatite association: The melilitolite from Pian di Celle, Italy. Mineralogy and Petrology, 61 (1) 27-45 doi:10.1007/bf01172476
Sharygin, Victor V., Pekov, Igor V., Zubkova, Natalia V., Khomyakov, Alexander P., Stoppa, Francesco, Pushcharovsky, Dmitry Yu. (2013) Umbrianite, K7Na2Ca2[Al3Si10O29]F2Cl2, a new mineral species from melilitolite of the Pian di Celle volcano, Umbria, Italy. European Journal of Mineralogy, 25 (4) 655-669 doi:10.1127/0935-1221/2013/0025-2306
 
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