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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Brookite from
County Line Quarry, Wrightsville, York County, Pennsylvania, USA


05244990017271981972317.jpg
Brookite, etc.

County Line Quarry, Wrightsville, York County, Pennsylvania, USA
05244990017271981972317.jpg
Brookite, etc.

County Line Quarry, Wrightsville, York County, Pennsylvania, USA
05244990017271981972317.jpg
Brookite, etc.

County Line Quarry, Wrightsville, York County, Pennsylvania, USA
Locality type:Quarry
Classification
Species:Brookite
Formula:TiO2
Comments:Occurances at approximately the 40 01'02"N, 76 31'31"W portion of the quarry. Microcrystals occuring in calcite or directly on the phyllite schist, along veinlets. Larger xtls found in within several milky quartz pods, typically 30cm by 6 to 15 m in length. Associated with Anatase occasionally as an alteration of Ilmenite.
Habit:Microcrystals to larger, thin, platy xtls, deeply striates parallel to their length.
Colour:transparent (micro-xtls), to light brown
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Anatase1
Data
Mineral Data:Click here to view Brookite data
Locality Data:Click here to view County Line Quarry, Wrightsville, York County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:224182
Long-form Identifier:1:3:224182:1
GUID (UUID V4):0
Nearest other occurrences of Brookite
47.8km (29.7 miles) ⓘCarter's Chrome Mine, Little Britain Township, Lancaster County, Pennsylvania, USA
87.5km (54.4 miles) ⓘBlack Rock Tunnel (Conrail Tunnel), Phoenixville, Chester County, Pennsylvania, USA
References
The Mineralogy of Pennsylvania 1966-1975
Robert C. Smith II, pgs. 23-30
 
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