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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Opal-AN from
Black Mountain Quarry, Rumford, Oxford County, Maine, USA


Locality type:Quarry
Classification
Species:Opal var: Opal-AN
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal-AN data
Locality Data:Click here to view Black Mountain Quarry, Rumford, Oxford County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:28656
Long-form Identifier:1:3:28656:7
GUID (UUID V4):0
Nearest other occurrences of Opal-AN
7.5km (4.6 miles) ⓘBell pit, Newry, Oxford County, Maine, USA
7.6km (4.7 miles) ⓘCrooker Gem Pegmatite Quarries, Newry, Oxford County, Maine, USA
7.7km (4.8 miles) ⓘDunton Gem Quarry, Newry, Oxford County, Maine, USA
28.2km (17.5 miles) ⓘSongo Pond Quarry (Kimball Ledge Quarry), Albany, Oxford County, Maine, USA
32.0km (19.9 miles) ⓘHeikkinen Quarry, Greenwood, Oxford County, Maine, USA
32.4km (20.1 miles) ⓘHayes Ledge Quarries (East and West), Greenwood, Oxford County, Maine, USA
35.2km (21.9 miles) ⓘRyerson Hill Quarries, Paris, Oxford County, Maine, USA
36.9km (22.9 miles) ⓘBennett Quarry, Buckfield, Oxford County, Maine, USA
37.7km (23.4 miles) ⓘMount Mica Quarry, Paris, Oxford County, Maine, USA
47.0km (29.2 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
References
 
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