Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Laumontite from
Hays Point, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA


Locality type:Point
Classification
Species:Laumontite
Formula:CaAl2Si4O12 · 4H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Laumontite data
Locality Data:Click here to view Hays Point, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:416488
Long-form Identifier:1:3:416488:3
GUID (UUID V4):0
Nearest other occurrences of Laumontite
2.2km (1.4 miles) ⓘManganese Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
3.2km (2.0 miles) ⓘClark Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
4.1km (2.6 miles) ⓘMontreal Mine, Mosquito Mining District, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
4.4km (2.7 miles) ⓘHorseshoe Harbor, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA
5.0km (3.1 miles) ⓘLakeshore traps, Eagle Harbor Township, Keweenaw County, Michigan, USA
5.7km (3.5 miles) ⓘNew York and Michigan Exploration, Grant Township, Keweenaw County, Michigan, USA
6.8km (4.2 miles) ⓘAetna Exploration Copper Mine, Grant Township, Keweenaw County, Michigan, USA
7.1km (4.4 miles) ⓘVulcan Exploration Copper Mine, Grant Township, Keweenaw County, Michigan, USA
7.1km (4.4 miles) ⓘLac La Belle exploration, Lac La Belle, Grant Township, Keweenaw County, Michigan, USA
8.6km (5.4 miles) ⓘDan's Point, Eagle Harbor Township, Keweenaw County, Michigan, USA
References
Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
 
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