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


09684550017272040218374.jpg
Aegirine, etc.

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
04083640017368125359512.jpg
Aegirine

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
09684550017272040218374.jpg
Aegirine, etc.

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
04083640017368125359512.jpg
Aegirine

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
09684550017272040218374.jpg
Aegirine, etc.

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
04083640017368125359512.jpg
Aegirine

Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
Locality type:Quarry
Classification
Species:Aegirine
Formula:NaFe3+Si2O6
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Melilite Group1
Magnetite1
Data
Mineral Data:Click here to view Aegirine data
Locality Data:Click here to view Vispi Quarry, San Venanzo, Terni Province, Umbria, Italy
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:677882
Long-form Identifier:1:3:677882:8
GUID (UUID V4):0
References
De Michele, V. (1974) Guida mineralogica d'Italia. Istituto Geografico De Agostini.
Meli R. (1997) - Giacimenti da non dimenticare: i minerali della vulcaniti di San Venanzo (Terni). Riv. Miner. Ital. 3, pag. 269-275
Meli, R. (1997) Giacimenti da non dimenticare: i minerali delle vulcaniti di San Venanzo (Terni). Rivista Mineralogica Italiana, 21, 3 (3-1997), 269-275
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
Stoppa, F., Schiazza, M. (2014) Extreme chemical conditions of crystallisation of Umbrian Melilitolites and wealth of rare, late stage/hydrothermal minerals. Open Geosciences, 6 (4). doi:10.2478/s13533-012-0190-z
 
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