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
Slocum prospect, East Hampton, Middlesex County, Connecticut, USA


05623890017390640828480.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
05115520017390961201071.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
04362160017272023592836.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
03975240017272023607762.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
04105800017390630554940.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
05115520017390961201071.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
08670190017369226116212.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
00992220017369226157303.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
02655210017391789433867.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
08135390017391789434313.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
04362160017272023592836.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
03975240017272023607762.jpg
Columbite-(Fe), etc.

Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
Locality type:Prospect
Classification
Species:Columbite-(Fe)
Formula:Fe2+Nb2O6
Comments:"fine little tabular crystals are occasionally found with beryl" Schooner (1958)
Habit:tabular
Colour:black
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Beryl11
Microcline9
Albite6
Almandine3
Zircon2
Fluorite2
- var Chlorophane2
Muscovite2
Schorl2
Opal1
- var Opal-AN1
Spessartine1
Quartz1
Data
Mineral Data:Click here to view Columbite-(Fe) data
Locality Data:Click here to view Slocum prospect, East Hampton, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:130359
Long-form Identifier:1:3:130359:9
GUID (UUID V4):0
Nearest other occurrences of Columbite-(Fe)
4.5km (2.8 miles) ⓘAnderson No. 2 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
5.1km (3.1 miles) ⓘRock Landing Quarry (Capt. Rohrback Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
5.5km (3.4 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
7.0km (4.3 miles) ⓘChrysoberyl locality, Haddam, Middlesex County, Connecticut, USA
8.3km (5.1 miles) ⓘState Forest Quarry No. 2, Cobalt, East Hampton, Middlesex County, Connecticut, USA
8.9km (5.6 miles) ⓘNathan Hall Quarry, East Hampton, Middlesex County, Connecticut, USA
9.1km (5.6 miles) ⓘCivilian Conservation Corps prospect (CCC prospect; Cook columbite prospect), Haddam, Middlesex County, Connecticut, USA
9.1km (5.7 miles) ⓘState Forest Quarry No. 1, East Hampton, Middlesex County, Connecticut, USA
11.0km (6.8 miles) ⓘWhite Rocks Quarry (Consolidated Quarry), White Rock Mining District, Middletown, Middlesex County, Connecticut, USA
11.2km (7.0 miles) ⓘPenfield Quarry (Oak Leaf Quarry), Portland, Middlesex County, Connecticut, USA
References
Rocks & Min.: 12:145.
Cameron, Eugene N., Larrabee, David M., McNair, Andrew H., Page, James J., Stewart, Glen W., Shainin, Vincent E. (1954) Pegmatite Investigations, 1942-45, in New England. Geological Survey Professional Paper 255. US Geological Survey doi:10.3133/pp255
Schooner (1958 and 1961)
 
and/or  
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