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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Pseudocubic Quartz from
Tamminen Quarry, Greenwood, Oxford County, Maine, USA


02517150017726548151442.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
00861270017272014136743.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
05783080017272014115414.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
05190620017339893349591.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
07433460017726547778293.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
00861270017272014136743.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
05783080017272014115414.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
02069040017339893349984.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
02517150017726548151442.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
00263000017363108359592.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
03882090017272014162092.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
05190620017339893349591.jpg
Pseudocubic Quartz

Tamminen Quarry, Greenwood, Oxford County, Maine, USA
Locality type:Quarry
Classification
Species:Quartz var: Pseudocubic Quartz
Formula:SiO2
Habit:Pseudocubic appearance due to equal development of "r" faces and near absence of prism faces.
Colour:Transparent, colorless
Luminescent properties:None
Quality for species:Excellent - world class for species or very significant. (!!)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Quartz2
Cookeite2
Data
Mineral Data:Click here to view Pseudocubic Quartz data
Locality Data:Click here to view Tamminen Quarry, Greenwood, Oxford County, Maine, USA
Photo GalleryView Gallery (6 photos)
Data Identifiers
Mindat Occurrence Record ID:648100
Long-form Identifier:1:3:648100:1
GUID (UUID V4):0
References
Nestor Tamminen discovery
also Mineral News (1993) 9:2 p. 8
 
and/or  
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