Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Antigorite from
Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA


Locality type:Mine
Classification
Species:Antigorite
Formula:Mg3(Si2O5)(OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Antigorite data
Locality Data:Click here to view Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:665881
Long-form Identifier:1:3:665881:6
GUID (UUID V4):0
Nearest other occurrences of Antigorite
45.4km (28.2 miles) ⓘGrace Mine, Morgantown, Berks County, Pennsylvania, USA
61.0km (37.9 miles) ⓘMaryland Green Marble Corporation Quarry (Cardiff Serpentine Quarry), Cardiff, Harford County, Maryland, USA
63.1km (39.2 miles) ⓘJenkins Mine (Jenkins Corner; North Rock Springs), Fulton Township, Lancaster County, Pennsylvania, USA
63.4km (39.4 miles) ⓘRock Springs Iron Mine, Fulton Township, Lancaster County, Pennsylvania, USA
63.7km (39.6 miles) ⓘRed Pit Mine, Fulton Township, Lancaster County, Pennsylvania, USA
63.7km (39.6 miles) ⓘLine pit (Lowe's Chromite Mine), Fulton Township, Lancaster County, Pennsylvania, USA
63.7km (39.6 miles) ⓘLine pit (Lowe's Mine), Cecil County, Maryland, USA
64.0km (39.8 miles) ⓘCedar Hill Quarry (Stoltzfuss Quarry), Fulton Township, Lancaster County, Pennsylvania, USA
64.2km (39.9 miles) ⓘHaines & Kibblehouse Penn-Maryland Materials Quarry, Fulton Township, Lancaster County, Pennsylvania, USA
64.5km (40.1 miles) ⓘWood's Chrome Mine, Texas, Little Britain Township, Lancaster County, Pennsylvania, USA
References
Weber, Jon N., Greer, Raymond T. (1965) Dehydration of serpentine: Heat of reaction and reaction kinetics at PH2O = 1 atm. American Mineralogist, 50 (3-4). 450-464
 
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