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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Columbite-(Fe) from
Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA


00208790017272051994290.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
09179700017384731994651.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
09714910017272013003827.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
02659450017272012998360.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
09383360017367627673608.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05067650017384688708447.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
03341040017367627701581.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07199230017367627692325.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
00208790017272051994290.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
01929970017385683345638.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
09714910017272013003827.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
02659450017272012998360.jpg
Columbite-(Fe), etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Columbite-(Fe)
Formula:Fe2+Nb2O6
Comments:Well-formed iridescent crystals to 2 cm long, usually enclosed in microcline. The identification was made by Petr Cerny at the University of Manitoba, using microprobe analysis (Scovil 1992).
Habit:elongated tabular prisms
Colour:black with iridescence
Quality for species:Good crystals or rich for species - important (!)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite8
Quartz8
- var Smoky Quartz1
Fluorapatite5
Muscovite5
- var Schernikite2
Microcline2
Beryl1
Elbaite1
Microlite Group1
Fluorite1
- var Chlorophane1
Schorl1
Cookeite1
Data
Mineral Data:Click here to view Columbite-(Fe) data
Locality Data:Click here to view Gillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:38366
Long-form Identifier:1:3:38366:6
GUID (UUID V4):0
Nearest other occurrences of Columbite-(Fe)
1.5km (0.9 miles) ⓘChrysoberyl locality, Haddam, Middlesex County, Connecticut, USA
2.0km (1.2 miles) ⓘRock Landing Quarry (Capt. Rohrback Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
2.7km (1.7 miles) ⓘAnderson No. 2 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
3.9km (2.4 miles) ⓘCivilian Conservation Corps prospect (CCC prospect; Cook columbite prospect), Haddam, Middlesex County, Connecticut, USA
5.5km (3.4 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
8.3km (5.2 miles) ⓘJohn Salak Quarry, Haddam, Middlesex County, Connecticut, USA
9.4km (5.8 miles) ⓘTollgate Quarry (Tollgate Mine; Bidwell Quarry; China-stone Quarry), Middletown, Middlesex County, Connecticut, USA
9.8km (6.1 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
10.1km (6.3 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
10.6km (6.6 miles) ⓘRiverside Quarry (Western Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
References
Bowman, H. L. (1902) On an occurrence of Minerals at Haddam Neck, Connecticut, U.S.A. Mineralogical Magazine and Journal of the Mineralogical Society, 13 (60). 97-121 doi:10.1180/minmag.1902.13.60.02
Scovil, Jeffrey A. (1992) Famous Mineral Localities: The Gillette Quarry, Haddam Neck, Connecticut. The Mineralogical Record, 23 (1) 19-80
 
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