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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Tourmaline from
Millie Mine, Dickinson County, Michigan, USA


Locality type:Mine
Classification
Species:'Tourmaline' (not an IMA approved species)
Formula:AD3G6(T6O18)(BO3)3X3Z
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tourmaline data
Locality Data:Click here to view Millie Mine, Dickinson County, Michigan, USA
Data Identifiers
Mindat Occurrence Record ID:417800
Long-form Identifier:1:3:417800:2
GUID (UUID V4):0
Nearest other occurrences of Tourmaline
1.0km (0.6 miles) ⓘChapin Mine, Iron Mountain, Dickinson County, Michigan, USA
12.1km (7.5 miles) ⓘPayant-Chrissman prospect (Florence County prospect), Aurora, Florence County, Wisconsin, USA
13.4km (8.3 miles) ⓘWest Vulcan Mine, Vulcan, Dickinson County, Michigan, USA
19.7km (12.2 miles) ⓘGroveland Mine, Randville, Dickinson County, Michigan, USA
21.4km (13.3 miles) ⓘSturgeon River Pegmatite Quarry, Dickinson County, Michigan, USA
23.4km (14.6 miles) ⓘAnimikie Red Ace pegmatite, Pine River pegmatites, Fern, Florence County, Wisconsin, USA
25.0km (15.5 miles) ⓘHorserace Rapids, Paint River, Mastodon Township, Iron County, Michigan, USA
26.3km (16.3 miles) ⓘFelch, Dickinson County, Michigan, USA
37.6km (23.4 miles) ⓘCrystal Falls, Iron County, Michigan, USA
44.9km (27.9 miles) ⓘSturgeon quartzite, Dickinson 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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