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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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Rockbridgeite from
Boa Vista pegmatite, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil


07154480017368076504939.jpg
Rockbridgeite

Boa Vista pegmatite, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
07154480017368076504939.jpg
Rockbridgeite

Boa Vista pegmatite, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
02816440017271988192323.jpg
Rockbridgeite

Boa Vista pegmatite, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
Locality type:Pegmatite
Classification
Species:Rockbridgeite
Formula:(Fe2+0.5Fe3+0.5)2Fe33+(PO4)3(OH)5
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite12
Phosphosiderite12
Variscite11
Strengite6
Bermanite1
Hureaulite1
Saléeite1
Data
Mineral Data:Click here to view Rockbridgeite data
Locality Data:Click here to view Boa Vista pegmatite, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
Data Identifiers
Mindat Occurrence Record ID:49711
Long-form Identifier:1:3:49711:8
GUID (UUID V4):0
Nearest other occurrences of Rockbridgeite
0.1km (0.1 miles) ⓘEduardo claim, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
0.4km (0.3 miles) ⓘBode claim, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
1.6km (1.0 miles) ⓘCigana claim, Barra do Cuieté, Conselheiro Pena, Minas Gerais, Brazil
10.9km (6.8 miles) ⓘConselheiro Pena pegmatite district, Conselheiro Pena, Minas Gerais, Brazil
20.2km (12.6 miles) ⓘSapucaia mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil
26.4km (16.4 miles) ⓘBoca Rica claim, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil
45.1km (28.0 miles) ⓘTelírio claim, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
References
Cassedanne, J. P., Cassedanne, J. O. (1982) Presence de legrandite dans une pegmatite de Minas Gerais, Bresil. The Canadian Mineralogist, 20 (1) 87-89
Bermanec, V., Scholz, R., Marković, F., Gobac, Ž.Ž., and Chaves, M.L.D.S.C. (2011) Mineralogy of the Boa Vista pegmatite, Galileia, Minas Gerais, Brazil. 5th international symposium on granitic pegmatites, PEG 2011.
 
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