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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Matildite from
Black Cloud Mine (Resurrection Mine 0080650339; Yak Tunnel; Leadville Unit; Irene Shaft), Iowa Gulch, Leadville, Lake County, Colorado, USA


Locality type:Mine
Classification
Species:Matildite
Formula:AgBiS2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Matildite data
Locality Data:Click here to view Black Cloud Mine (Resurrection Mine 0080650339; Yak Tunnel; Leadville Unit; Irene Shaft), Iowa Gulch, Leadville, Lake County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:488782
Long-form Identifier:1:3:488782:9
GUID (UUID V4):0
Nearest other occurrences of Matildite
3.5km (2.2 miles) ⓘWhite Cap Mine, Lake County, Colorado, USA
3.8km (2.4 miles) ⓘTucson Mine, Iron Hill, Lake County, Colorado, USA
4.8km (3.0 miles) ⓘGreenback Mine, Iron Hill, Lake County, Colorado, USA
12.1km (7.5 miles) ⓘOrphan Mine (Orphan Boy Mine), Alma, Alma Mining District, Park County, Colorado, USA
37.3km (23.2 miles) ⓘEagle Mine, Gilman, Gilman Mining District (Battle Mountain Mining District; Red Cliff Mining District), Eagle County, Colorado, USA
45.4km (28.2 miles) ⓘMissouri Mine, Hall Valley (Hall's Valley), Montezuma Mining District, Park County, Colorado, USA
51.6km (32.1 miles) ⓘBaltic (Sill; Gold Cord), Geneva District, Clear Creek County, Colorado, USA
57.9km (36.0 miles) ⓘVidler Tunnels West; Queen of the West, Peru Creek Area, Argentine Mining District, Summit County, Colorado, USA
68.6km (42.6 miles) ⓘGeorgetown-Silver Plume Mining District (Griffith Mining District; Silver Plume Mining District), Clear Creek County, Colorado, USA
81.7km (50.8 miles) ⓘAlice Glory Hole, Alice Mine, Alice Mining District (Yankee Mining District; Lincoln Mining District), Clear Creek County, Colorado, USA
References
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
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