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 from
Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA


00673260017364628591412.jpg
Opal-AN

Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
00673260017364628591412.jpg
Opal-AN

Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
05545470017364628593361.jpg
Opal-AN

Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Confirmed
Confirmation Methods:Visual (Fluorescence)
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Maine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:1010280
Long-form Identifier:1:3:1010280:2
GUID (UUID V4):0
Nearest other occurrences of Opal
17.5km (10.9 miles) ⓘHeath Quarry, Casco, Cumberland County, Maine, USA
24.9km (15.4 miles) ⓘMount Mica Quarry, Paris, Oxford County, Maine, USA
25.2km (15.7 miles) ⓘBennett Quarry, Buckfield, Oxford County, Maine, USA
27.0km (16.8 miles) ⓘRyerson Hill Quarries, Paris, Oxford County, Maine, USA
30.6km (19.0 miles) ⓘWilliam Willes #1 Quarry, Topsham, Sagadahoc County, Maine, USA
31.1km (19.3 miles) ⓘYedlin Locality, Standpipe Hill Quarries, Topsham, Sagadahoc County, Maine, USA
35.8km (22.2 miles) ⓘHeikkinen Quarry, Greenwood, Oxford County, Maine, USA
36.1km (22.4 miles) ⓘHayes Ledge Quarries (East and West), Greenwood, Oxford County, Maine, USA
41.5km (25.8 miles) ⓘEmmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA
47.2km (29.3 miles) ⓘEstes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
References
Bill Bunn
 
and/or  
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