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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Dumortierite from
Schiesone Creek, Rifugio Il Biondo, Schiesone Valley, Prata Camportaccio, Sondrio Province, Lombardy, Italy


Locality type:Creek
Classification
Species:Dumortierite
Formula:Al(Al2O)(Al2O)2(SiO4)3(BO3)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Chlorite Group5
Quartz2
Data
Mineral Data:Click here to view Dumortierite data
Locality Data:Click here to view Schiesone Creek, Rifugio Il Biondo, Schiesone Valley, Prata Camportaccio, Sondrio Province, Lombardy, Italy
Photo GalleryView Gallery (5 photos)
Data Identifiers
Mindat Occurrence Record ID:968905
Long-form Identifier:1:3:968905:3
GUID (UUID V4):0
Nearest other occurrences of Dumortierite
20.2km (12.5 miles) Forno glacier, Val Forno, Upper Val Bregaglia, Bregaglia, Maloja Region, Grisons, Switzerland
22.5km (14.0 miles) Sissone Valley, Chiesa in Valmalenco, Sondrio Province, Lombardy, Italy
31.2km (19.4 miles) Castione, Arbedo-Castione, Bellinzona, Ticino, Switzerland
58.4km (36.3 miles) Crodolo Valley, Brissago, Locarno, Ticino, Switzerland
60.7km (37.7 miles) Ponte Valley, Brissago, Locarno, Ticino, Switzerland
87.0km (54.0 miles) Nibbio-Val Faera (Nibbio-Val Fredda) pegmatites, Nibbio, Mergozzo, Verbano-Cusio-Ossola Province, Piedmont, Italy
87.5km (54.4 miles) Ornavasso pegmatite, Ornavasso, Verbano-Cusio-Ossola Province, Piedmont, Italy
87.7km (54.5 miles) Cuzzago-Proman pegmatite veins, Premosello-Chiovenda, Verbano-Cusio-Ossola Province, Piedmont, Italy
89.4km (55.5 miles) Colloro-(Premosello) pegmatite veins, Premosello-Chiovenda, Verbano-Cusio-Ossola Province, Piedmont, Italy
References
 
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