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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Gahnite from
Groves Quarry (Hole in the Ground Quarry), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA


08686360017271923308031.jpg
Gahnite

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
05586950017272017725342.jpg
Gahnite

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
07372900017272023199714.jpg
Gahnite, etc.

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
06055830017272023205770.jpg
Gahnite, etc.

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
05748430017362839159133.jpg
Gahnite

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
05586950017272017725342.jpg
Gahnite

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
01055100017369214144292.jpg
Gahnite, etc.

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
04436670017369214148625.jpg
Gahnite, etc.

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
08686360017271923308031.jpg
Gahnite

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
05586950017272017725342.jpg
Gahnite

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
07372900017272023199714.jpg
Gahnite, etc.

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
06055830017272023205770.jpg
Gahnite, etc.

Groves Quarry, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
Locality type:Quarry
Classification
Species:Gahnite
Formula:ZnAl2O4
Comments:Crystals to 15 cm known, but sharp well-formed crystals to 7 x 5 cm.
Habit:octahedral
Colour:dark bluish to greenish black
Quality for species:Excellent - world class for species or very significant. (!!)
Abundance at site:Rare
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Muscovite3
Albite2
Almandine1
Quartz1
Data
Mineral Data:Click here to view Gahnite data
Locality Data:Click here to view Groves Quarry (Hole in the Ground Quarry), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:33304
Long-form Identifier:1:3:33304:1
GUID (UUID V4):0
Nearest other occurrences of Gahnite
0.1km (0.0 miles) ⓘWade Quarry (Androscoggin Tourmaline prospect), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
0.2km (0.1 miles) ⓘPulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
0.3km (0.2 miles) ⓘKeith Quarry (Towne Quarry), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
1.1km (0.7 miles) ⓘMaine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
29.4km (18.3 miles) ⓘCoombs Quarries, Bowdoin, Sagadahoc County, Maine, USA
29.6km (18.4 miles) ⓘCobble Hill Quarry (George Howe prospect), West Paris, Oxford County, Maine, USA
31.6km (19.6 miles) ⓘStaples Quarry, Topsham, Sagadahoc County, Maine, USA
31.9km (19.8 miles) ⓘFisher Quarry, Topsham, Sagadahoc County, Maine, USA
34.1km (21.2 miles) ⓘWitt Hill Chrysoberyl locality, Greenwood, Oxford County, Maine, USA
34.9km (21.7 miles) ⓘMorgan Quarry (Morgan Pit; Upper Noyes Mountain Quarry; Upper Harvard Quarry), Greenwood, Oxford County, Maine, USA
References
King, Vandall T., Foord, Eugene E. (1994) Mineralogy of Maine Vol. 1 - Descriptive mineralogy. Maine Geological Survey.
 
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