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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Rockbridgeite from
Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA


Locality type:Quarry
Classification
Species:Rockbridgeite
Formula:(Fe2+0.5Fe3+0.5)2Fe33+(PO4)3(OH)5
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Rockbridgeite data
Locality Data:Click here to view Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:32912
Long-form Identifier:1:3:32912:7
GUID (UUID V4):0
Nearest other occurrences of Rockbridgeite
45.8km (28.4 miles) ⓘBerry-Havey Quarry, Poland, Androscoggin County, Maine, USA
52.3km (32.5 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
55.0km (34.2 miles) ⓘRyerson Hill Quarries, Paris, Oxford County, Maine, USA
69.5km (43.2 miles) ⓘParker Mountain Mine, Strafford, Strafford County, New Hampshire, USA
76.3km (47.4 miles) ⓘDunton Gem Quarry, Newry, Oxford County, Maine, USA
76.5km (47.5 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
76.5km (47.6 miles) ⓘBell pit, Newry, Oxford County, Maine, USA
76.6km (47.6 miles) ⓘNevel Quarry, Newry, Oxford County, Maine, USA
77.9km (48.4 miles) ⓘRed Hill quarries, Rumford, Oxford County, Maine, USA
81.7km (50.8 miles) ⓘBlack Mountain Quarry, Rumford, Oxford County, Maine, USA
References
Thompson, Woodrow B., Bearss, Gene T., Falster, Alexander U., Simmons, William B., Nizamoff, Jams W. (2000) The Estes Quarry, Cumberland County, Maine: A New Pegmatite Mineral Locality. Rocks & Minerals, 75 (6) 408-418 doi:10.1080/00357520009605667
Mineral News (2000) 16:1 pp1,4,5
 
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