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


03340690017384709368599.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07799090017272013888494.jpg
Microlite Group

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07306150017272013907556.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05661000017374081491473.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
03340690017384709368599.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07799090017272013888494.jpg
Microlite Group

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07306150017272013907556.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
00734990017373368539038.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
06120310017384732007582.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07799090017272013888494.jpg
Microlite Group

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07306150017272013907556.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05661000017374081491473.jpg
Microlite Group, etc.

Gillette Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:'Microlite Group' (not an IMA approved species)
Formula:A2-mTa2X6-wZ1-n
Comments:Crystals up to 1.1 cm, resinous, some are radioactive and surrounded by dark halos, associated with dark smoky quartz, sharp little crystals of muscovite, acicular green tourmaline, beryl, fluorite, cleavelandite.
Habit:modified octahedra
Colour:brown to black
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Albite6
- var Cleavelandite1
Quartz6
- var Smoky Quartz2
Muscovite6
- var Schernikite3
Elbaite5
Beryl5
Fluorapatite2
Cookeite2
Fluorite2
- var Chlorophane2
Microcline1
Cassiterite1
Columbite-(Fe)1
Lepidolite1
Data
Mineral Data:Click here to view Microlite Group 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:38357
Long-form Identifier:1:3:38357:8
GUID (UUID V4):0
Nearest other occurrences of Microlite Group
1.5km (0.9 miles) ⓘChrysoberyl locality, Haddam, Middlesex County, Connecticut, USA
2.8km (1.7 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
4.4km (2.7 miles) ⓘHewitt Gem Quarry (Herb's Gem Quarry; Sawmill Quarry), Haddam, Middlesex County, Connecticut, USA
4.6km (2.9 miles) ⓘLong Hill prospects (Turkey Hill prospects), Haddam, Middlesex County, Connecticut, USA
5.5km (3.4 miles) ⓘSlocum prospect, East Hampton, Middlesex County, Connecticut, USA
8.4km (5.2 miles) ⓘBecker Quarry, 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
12.2km (7.6 miles) ⓘHale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
13.0km (8.1 miles) ⓘStrickland Quarry, Strickland pegmatite, Collins Hill, Portland, 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
Schooner, Richard. (1958) THE MINERALOGY OF THE PORTLAND-EAST HAMPTON-MIDDLETOWN-HADDAM AREA IN CONNECTICUT (With a few notes on Glastonbury and Marlborough)
Seaman, David (1976) Pegmatite Minerals of the World. In Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Connecticut.
Scovil, Jeffrey A. (1992) Famous Mineral Localities: The Gillette Quarry, Haddam Neck, Connecticut. The Mineralogical Record, 23 (1) 19-80
 
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