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


05650910017587162501622.jpg
Opal-AN

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
05650910017587162501622.jpg
Opal-AN

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
09140460017587162527323.jpg
Opal-AN

Estes Quarry, West Baldwin, Baldwin, Cumberland 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 Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
Data Identifiers
Mindat Occurrence Record ID:32891
Long-form Identifier:1:3:32891:5
GUID (UUID V4):0
Nearest other occurrences of Opal-AN
29.7km (18.4 miles) ⓘHeath Quarry, Casco, Cumberland County, Maine, USA
32.8km (20.4 miles) ⓘLovejoy Gravel pits, Conway, Carroll County, New Hampshire, USA
34.1km (21.2 miles) ⓘGovernment pit, Albany, Carroll County, New Hampshire, USA
37.0km (23.0 miles) ⓘMiddle Moat Mountain locality, Hale's Location, Carroll County, New Hampshire, USA
42.8km (26.6 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
47.2km (29.3 miles) ⓘMaine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
49.9km (31.0 miles) ⓘHayes Ledge Quarries (East and West), Greenwood, Oxford County, Maine, USA
50.4km (31.3 miles) ⓘHeikkinen Quarry, Greenwood, Oxford County, Maine, USA
52.2km (32.4 miles) ⓘMount Mica Quarry, Paris, Oxford County, Maine, USA
54.8km (34.1 miles) ⓘSongo Pond Quarry (Kimball Ledge Quarry), Albany, Oxford County, Maine, USA
References
 
and/or  
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