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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Microcline from
Rock Landing Quarry (Capt. Rohrback Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA


00645040017368815332465.jpg
Microcline

Rock Landing Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
09302240017368815337168.jpg
Microcline, etc.

Rock Landing Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
00645040017368815332465.jpg
Microcline

Rock Landing Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
07647890017272012885579.jpg
Microcline, etc.

Rock Landing Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05253290017272052169277.jpg
Microcline

Rock Landing Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
05504620017272012935728.jpg
Microcline, etc.

Rock Landing Quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Microcline
Formula:K(AlSi3O8)
Comments:Large crystals to over 30 cm.
Habit:mostly anhedral, rarely subhedral prisms
Colour:tan
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Abundance at site:Extremely common
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Uranophane3
Columbite-(Fe)3
Meta-autunite3
Quartz3
Uraninite2
Thorite2
- var Thorogummite2
Muscovite1
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Rock Landing Quarry (Capt. Rohrback Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:37139
Long-form Identifier:1:3:37139:7
GUID (UUID V4):0
Nearest other occurrences of Microcline
0.8km (0.5 miles) ⓘKnudsen prospects, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
0.9km (0.6 miles) ⓘAnderson No. 2 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
0.9km (0.6 miles) ⓘAnderson No. 1 Mica Mine, East Hampton, Middlesex County, Connecticut, USA
1.0km (0.6 miles) ⓘBailey prospect, East Hampton, Middlesex County, Connecticut, USA
1.0km (0.6 miles) ⓘFeldspar quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
1.1km (0.7 miles) ⓘTidewater feldspar quarry, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
1.1km (0.7 miles) ⓘAmphibole-tourmaline-magnetite locality, Haddam Neck, Haddam, Middlesex County, Connecticut, USA
1.4km (0.8 miles) ⓘEnegren Mica Mine, East Hampton, Middlesex County, Connecticut, USA
2.0km (1.2 miles) ⓘGillette Quarry (J-J Mine; Haddam Neck Quarry), Haddam Neck, Haddam, Middlesex County, Connecticut, USA
2.1km (1.3 miles) ⓘHurd State Park quarries, East Hampton, Middlesex County, Connecticut, USA
References
plus many collections and field observations.
Elwell, Wilbur J. (1936) Mineral Collecting by Hydroplane. Rocks and Minerals, 11 (6). 92-93
Ingerson, Earl (1938) Uraninite and associated minerals from Haddam Neck, Connecticut. American Mineralogist, 23 (4) 269-276
 
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