Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Serpentine Subgroup from
Porter property, Newtown, Grass Valley Mining District, Nevada County, California, USA


Locality type:Property
Classification
Species:'Serpentine Subgroup' (not an IMA approved species)
Formula:D3[Si2O5](OH)4
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Serpentine Subgroup data
Locality Data:Click here to view Porter property, Newtown, Grass Valley Mining District, Nevada County, California, USA
Data Identifiers
Mindat Occurrence Record ID:950857
Long-form Identifier:1:3:950857:6
GUID (UUID V4):0
Nearest other occurrences of Serpentine Subgroup
2.4km (1.5 miles) ⓘHolseman Mine, Grass Valley, Grass Valley Mining District, Nevada County, California, USA
2.6km (1.6 miles) ⓘAlta Hill Mine (Alta Hill; Alta Hill Chrome Mine), Grass Valley, Grass Valley Mining District, Nevada County, California, USA
2.9km (1.8 miles) ⓘWaite property (White occurrence; White Estate Mine), Nevada City, Nevada City Mining District, Nevada County, California, USA
3.1km (1.9 miles) ⓘSherman Ranch occurrence (Hoeft lease [1918]), Nevada City, Nevada City Mining District, Nevada County, California, USA
5.0km (3.1 miles) ⓘGolden Gate group (Golden Gate Gp; Kentucky & Alpha; Golden Gate; Golden Gate East and West; Dana claim; Christopher Columbus claim; Golden Gate claim; Alpha claim; Ismert Ranch claim), Grass Valley, Grass Valley Mining District, Nevada County, California, USA
5.1km (3.2 miles) ⓘIdaho-Maryland Mine (Idaho Maryland prospect; Maryland Mine; Howard Hill/Morning Dew; Idaho Maryland-Brunswick), Idaho-Maryland group, Grass Valley, Grass Valley Mining District, Nevada County, California, USA
6.2km (3.9 miles) ⓘMaryland Mine (Maryland vein; Maryland Consolidated Quartz Mine and mill site; Maryland Con Qtz Mine; Maryland Ext. Qtz), Idaho-Maryland Mine (Idaho Maryland prospect; Maryland Mine; Howard Hill/Morning Dew; Idaho Maryland-Brunswick), Idaho-Maryland group, Grass Valley, Grass Valley Mining District, Nevada County, California, USA
19.1km (11.9 miles) ⓘRising Sun Mine, Colfax, Colfax Mining District (Illinois Mining District), Placer County, California, USA
20.7km (12.8 miles) ⓘUnnamed Asbestos occurrence [5], Burnt Flat, Colfax, Colfax Mining District (Illinois Mining District), Placer County, California, USA
22.0km (13.7 miles) ⓘUnnamed Asbestos prospect [6], Burnt Flat, Colfax, Colfax Mining District (Illinois Mining District), Placer County, California, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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