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
Parker Mountain Mine, Strafford, Strafford County, New Hampshire, USA


Locality type:Mine
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 Parker Mountain Mine, Strafford, Strafford County, New Hampshire, USA
Data Identifiers
Mindat Occurrence Record ID:50814
Long-form Identifier:1:3:50814:0
GUID (UUID V4):0
Nearest other occurrences of Rockbridgeite
65.6km (40.8 miles) ⓘE.E. Smith Mine, Alexandria, Grafton County, New Hampshire, USA
69.5km (43.2 miles) ⓘEstes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
74.9km (46.5 miles) ⓘFletcher Mine, Groton, Grafton County, New Hampshire, USA
77.3km (48.0 miles) ⓘKeyes Mica Quarries, Orange, Grafton County, New Hampshire, USA
77.9km (48.4 miles) ⓘPalermo No. 1 Mine, Groton, Grafton County, New Hampshire, USA
78.2km (48.6 miles) ⓘPalermo No. 2 Mine, Groton, Grafton County, New Hampshire, USA
88.8km (55.2 miles) ⓘChandlers Mill Quarry, Newport, Sullivan County, New Hampshire, USA
92.3km (57.3 miles) ⓘFitzgibbons Mine, Alstead, Cheshire County, New Hampshire, USA
References
Rocks & Min.:64:504.
Rocks & Minerals 80:4 pp234-241
 
and/or  
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