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


Locality type:Mine
Classification
Species:'Serpentine Subgroup' (not an IMA approved species)
Formula:D3[Si2O5](OH)4
Comments:Type locality for variety "Williamsite", a gemmy bright green serpentine often used as a semi-precious stone. Often associated with Chromite at this locality. discovered in 1849 by Lewis W. Williams, whom also first described Zaratite (Emerald Nickel) at Wood's Chrome Mine the same year.
Habit:crystaline Massive
Colour:brilliant green
Luminescent properties:none
Quality for species:Good crystals or rich for species - important (!)
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Chlorite Group5
Dozyite5
Chromite-Magnesiochromite Series2
Serpentine Subgroup1
- var Picrolite1
Magnesiochromite1
Garnet Group1
Data
Mineral Data:Click here to view Serpentine Subgroup 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:144145
Long-form Identifier:1:3:144145:1
GUID (UUID V4):0
Nearest other occurrences of Serpentine Subgroup
0.1km (0.0 miles) Carter's Chrome Mine, Little Britain Township, Lancaster County, Pennsylvania, USA
2.5km (1.6 miles) Goat Hill Magnesia Quarries, West Nottingham Township, Chester County, Pennsylvania, USA
2.7km (1.7 miles) Cedar Hill Quarry (Stoltzfuss Quarry), Fulton Township, Lancaster County, Pennsylvania, USA
2.7km (1.7 miles) Geiger Quarry, Little Britain Township, Lancaster County, Pennsylvania, USA
3.6km (2.2 miles) Haines & Kibblehouse Penn-Maryland Materials Quarry, Fulton Township, Lancaster County, Pennsylvania, USA
4.3km (2.7 miles) Rock Springs Run, Fulton Township, Lancaster County, Pennsylvania, USA
4.3km (2.7 miles) Jenkins Mine (Jenkins Corner; North Rock Springs), Fulton Township, Lancaster County, Pennsylvania, USA
4.8km (3.0 miles) Wet Pit Slaymaker Property, Fulton Township, Lancaster County, Pennsylvania, USA
4.8km (3.0 miles) Red Pit Mine, Fulton Township, Lancaster County, Pennsylvania, USA
5.6km (3.5 miles) Scott Mine, Nottingham, West Nottingham Township, Chester County, Pennsylvania, USA
References
 
and/or  
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