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
Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA


08793710017372217243985.jpg
Microcline, etc.

Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA
06887540017372217256265.jpg
Microcline

Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA
08793710017372217243985.jpg
Microcline, etc.

Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA
01395520017272298238945.jpg
Microcline

Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA
08793710017372217243985.jpg
Microcline, etc.

Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA
01395520017272298238945.jpg
Microcline

Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA
Locality type:Quarry
Classification
Species:Microcline
Formula:K(AlSi3O8)
Comments:Microcline perthite forms anhedral to subhedral crystals a few inches to 3 feet in diameter.
Abundance at site:Very common
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Muscovite6
Albite4
Quartz3
Schorl2
Beryl2
Columbite-(Fe)1
Uraninite1
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Bordonaro Quarry, Portland, Middlesex County, Connecticut, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:662172
Long-form Identifier:1:3:662172:8
GUID (UUID V4):0
Nearest other occurrences of Microcline
0.3km (0.2 miles) ⓘGotta-Wannerstrom Quarry, Portland, Middlesex County, Connecticut, USA
0.4km (0.2 miles) ⓘGotta-Walden Prospect, Portland, Middlesex County, Connecticut, USA
0.4km (0.2 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
0.7km (0.4 miles) ⓘAppletree Lane, Portland, Middlesex County, Connecticut, USA
0.8km (0.5 miles) ⓘHale Quarry (Andrews Quarry; Glastonbury Quarry), Portland, Middlesex County, Connecticut, USA
1.0km (0.6 miles) ⓘAndrews Quarry (old Hale Quarry; Grandfather Andrews Quarry), Portland, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘCase Quarry No. 1, Case Quarries, Portland, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘCase Quarry No. 2, Case Quarries, Portland, Middlesex County, Connecticut, USA
1.4km (0.9 miles) ⓘCase Prospect No. 4, Case Quarries, Portland, Middlesex County, Connecticut, USA
References
King, Van (n.d.) Personal communcation.
 
and/or  
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