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Chalcedony from
National Mine, Rockland, Ontonagon Co., Michigan, USA

Locality type:Mine
Species:Quartz var: Chalcedony
Validity:Believed Valid
References:Mineralogy of Michigan (2004) Heinrich & Robinson
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view National Mine, Rockland, Ontonagon Co., Michigan, USA
Nearest other occurrences of Chalcedony
28.3km (17.6 miles) White Pine Mine, White Pine, Ontonagon Co., Michigan, USA
30.7km (19.1 miles) Gull Point, Ontonagon Co., Michigan, USA
71.1km (44.2 miles) McLain State Park, Houghton Co., Michigan, USA
78.4km (48.7 miles) Calumet & Hecla No. 21 mine, Calumet & Hecla Mine, Calumet, Calumet Township, Houghton Co., Michigan, USA
80.6km (50.1 miles) St. Louis Mine Exploration, Laurium, Houghton Co., Michigan, USA
83.6km (52.0 miles) Wolverine Mine, Wolverine, Houghton Co., Michigan, USA
83.8km (52.1 miles) Wolverine No. 2 shaft, Wolverine Mine, Wolverine, Houghton Co., Michigan, USA
85.5km (53.1 miles) Black Creek, Keweenaw Co., Michigan, USA
91.7km (57.0 miles) Seven Mile Point Beach, Eagle River, Keweenaw Co., Michigan, USA
91.8km (57.0 miles) Sevenmile Point, Ahmeek, Keweenaw Co., Michigan, USA
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