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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Chalcedony from
Henry Erwin & Sons Mine, Topton, Berks County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Henry Erwin & Sons Mine, Topton, Berks County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:68322
Long-form Identifier:1:3:68322:9
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
28.6km (17.8 miles) ⓘFritz Island Mines, Cumru Township, Berks County, Pennsylvania, USA
47.0km (29.2 miles) ⓘEcton Mine, Perkiomen Mines, Audubon, Lower Providence Township, Montgomery County, Pennsylvania, USA
62.7km (38.9 miles) ⓘCastle Rock, Edgemont Township, Delaware County, Pennsylvania, USA
65.6km (40.8 miles) ⓘCorundum Hill, Newlin Township, Chester County, Pennsylvania, USA
66.1km (41.0 miles) ⓘBroomall, Township of Marple, Delaware County, Pennsylvania, USA
88.3km (54.9 miles) ⓘWhite Barrens, Elk Township, Chester County, Pennsylvania, USA
91.2km (56.6 miles) ⓘPluckemin, Bedminster Township, Somerset County, New Jersey, USA
92.1km (57.2 miles) ⓘWood's Chrome Mine, Texas, Little Britain Township, Lancaster County, Pennsylvania, USA
92.5km (57.5 miles) ⓘTrap Rock Industries Kingston Quarry, Kingston Trap Rock Quarry, Franklin Township, Somerset County, New Jersey, USA
92.5km (57.5 miles) ⓘAmerican Mine (Alpha Copper Mine; Bridgewater Mine; Somerville Mine; Somerville deposit), Bridgewater Township, Somerset County, New Jersey, USA
References
Topo. & Geol. Sur. of Penna Rpt #4: The Min. Pigments of Penna.:34-36.
 
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