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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Silver (commodity) from
Union Gulch Mine (Chetco; Pearson and Brothers; Bolinas), Five Brooks, Marin County, California, USA


Locality type:Mine
Classification
Commodity:Silver (commodity)
Data
Commodity Data:Click here to view Silver (commodity) data
Locality Data:Click here to view Union Gulch Mine (Chetco; Pearson and Brothers; Bolinas), Five Brooks, Marin County, California, USA
Data Identifiers
Mindat Occurrence Record ID:1206220
Long-form Identifier:1:3:1206220:7
GUID (UUID V4):0
Nearest other deposits of Silver (commodity)
1.9km (1.2 miles) Randall occurrence, Bolinas, Marin County, California, USA
7.5km (4.7 miles) Heaton's Flat Placer Mine, Five Brooks, Marin County, California, USA
7.9km (4.9 miles) San Geronimo prospect, San Geronimo, Marin County, California, USA
13.6km (8.4 miles) Southwest spur of Mount Tamalpais, Mount Tamalpais, Marin County, California, USA
44.6km (27.7 miles) South San Francisco Land & Improvement Company Mine, South San Francisco, San Mateo County, California, USA
52.3km (32.5 miles) Alum Mine, Leona Heights, Oakland, Oakland Hills (San Leandro Hills), Alameda County, California, USA
52.9km (32.8 miles) Leona Mine (Leona Heights Mine), Leona Heights deposit, Leona Heights, Oakland, Oakland Hills (San Leandro Hills), Alameda County, California, USA
69.1km (43.0 miles) Redwood City Operation Mine (Redwood City Mine), Redwood City, San Mateo County, California, USA
70.3km (43.7 miles) La Felis claim (La Feliz claim), Eagle Peak, Clayton, Contra Costa County, California, USA
70.3km (43.7 miles) Eagle Peak Au-Cu occurrence, Eagle Peak, Clayton, Contra Costa County, California, USA
 
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