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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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Magnesiochromite from
Wood's Chrome Mine, Texas, Little Britain Township, Lancaster County, Pennsylvania, USA


04126000017730867339837.jpg
Magnesiochromite, etc.

Wood's Chrome Mine, Texas, Little Britain Township, Lancaster County, Pennsylvania, USA
04126000017730867339837.jpg
Magnesiochromite, etc.

Wood's Chrome Mine, Texas, Little Britain Township, Lancaster County, Pennsylvania, USA
04126000017730867339837.jpg
Magnesiochromite, etc.

Wood's Chrome Mine, Texas, Little Britain Township, Lancaster County, Pennsylvania, USA
Locality type:Mine
Classification
Species:Magnesiochromite
Formula:MgCr2O4
Comments:Analysis of multiple samples of chrome-ore from Woods Mine are all well within the magnesiochromite composition space. See Pearre and Heyl. (Pearre, Nancy C., and Allen Van Heyl. Chromite and other mineral deposits in serpentine rocks of the Piedmont Upland, Maryland, Pennsylvania and Delaware. No. 1082. US Government Printing Office, 1960.)
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Serpentine Subgroup2
- var Picrolite1
Antigorite1
Chlorite Group1
Zaratite1
Data
Mineral Data:Click here to view Magnesiochromite data
Locality Data:Click here to view Wood's Chrome Mine, Texas, Little Britain Township, Lancaster County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:48375
Long-form Identifier:1:3:48375:3
GUID (UUID V4):0
Nearest other occurrences of Magnesiochromite
4.8km (3.0 miles) ⓘRed Pit Mine, Fulton Township, Lancaster County, Pennsylvania, USA
5.7km (3.5 miles) ⓘLine pit (Lowe's Mine), Cecil County, Maryland, USA
5.7km (3.5 miles) ⓘLine pit (Lowe's Chromite Mine), Fulton Township, Lancaster County, Pennsylvania, USA
References
Pearre, Nancy C. and Heyl Jr., Allen V. (1960), Chromite and Other Mineral Deposits in Serpentine Rocks Of the Piedmont Upland, Maryland, Pennsylvania And Delaware, USGS Bulletin 1082-K.
 
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