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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Chalcedony from
Clark Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, 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 Clark Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:1081087
Long-form Identifier:1:3:1081087:7
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
3.3km (2.1 miles) ⓘCopper Harbor, Grant Township, Keweenaw County, Michigan, USA
5.4km (3.4 miles) ⓘHorseshoe Harbor, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
5.8km (3.6 miles) ⓘLakeshore traps, Eagle Harbor Township, Keweenaw County, Michigan, USA
8.5km (5.3 miles) ⓘBrockway Mountain, Eagle Harbor Township, Keweenaw County, Michigan, USA
12.1km (7.5 miles) ⓘKeweenaw Point, Grant Township, Keweenaw County, Michigan, USA
15.0km (9.3 miles) ⓘEsrey Park, Eagle Harbor Township, Keweenaw County, Michigan, USA
15.1km (9.4 miles) ⓘAgate Harbor, Eagle Harbor Township, Keweenaw County, Michigan, USA
32.5km (20.2 miles) ⓘEagle River, Eagle River, Houghton Township, Keweenaw County, Michigan, USA
35.9km (22.3 miles) ⓘSilver Creek, Allouez Township, Keweenaw County, Michigan, USA
38.9km (24.1 miles) ⓘFive Mile Point, Allouez Township, Keweenaw County, Michigan, USA
References
Bornhorst, Theodore J., Rose, William I. (1994) Self-guided geological field trip to the Keweenaw Peninsula, Michigan. Proceedings, 40 (2). Institute on Lake Superior Geology. 1-185
 
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