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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Quartz from
Festerling Mine (Elsicor Mine; Cora Mine), Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA


05889330017367526457002.jpg
Quartz, etc.

Festerling Mine, Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
05889330017367526457002.jpg
Quartz, etc.

Festerling Mine, Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
09259290017272062546240.jpg
Quartz, etc.

Festerling Mine, Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
Locality type:Mine
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Smithsonite2
Chamosite1
Feldspar Group1
Dolomite1
Caledonite1
Cerussite1
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Festerling Mine (Elsicor Mine; Cora Mine), Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:742030
Long-form Identifier:1:3:742030:6
GUID (UUID V4):0
Nearest other occurrences of Quartz
0.6km (0.4 miles) ⓘUnnamed Zn-Cu prospect [1], Middle Pass Mining District, Cochise County, Arizona, USA
1.0km (0.6 miles) ⓘStandard Tungsten Mine (Head Center Mine; Black Prince Mine; Johnny Boy Mine; Johnnie Boy No. 1 Mine; Barite prospect; Kreis Mine), Black Diamond Peak, Middle Pass Mining District, Cochise County, Arizona, USA
1.0km (0.6 miles) ⓘUnnamed Cu-Zn-Au-As prospect, Middle Pass Mining District, Cochise County, Arizona, USA
2.2km (1.4 miles) ⓘMissionary shaft, Middlemarch Mine, Middle Pass Mining District, Cochise County, Arizona, USA
2.3km (1.4 miles) ⓘMiddlemarch Mine slag locality, Middlemarch Mine, Middle Pass Mining District, Cochise County, Arizona, USA
2.5km (1.5 miles) ⓘThe Pit prospect, Middle Pass Mining District, Cochise County, Arizona, USA
2.5km (1.5 miles) ⓘSilver Cloud Mine, Escapule Mine group, Middle Pass Mining District, Cochise County, Arizona, USA
2.9km (1.8 miles) ⓘGordon Spring prospects, Middle Pass Mining District, Cochise County, Arizona, USA
3.2km (2.0 miles) ⓘLoma Linda Mine (Loma Linda pit), Middle Pass Mining District, Cochise County, Arizona, USA
4.3km (2.7 miles) ⓘSan Juan Mine (San Juan group; Gordon Mine; Mann adit; Sulphide adit; Silver adit), Gordon Camp, Middle Pass Mining District, Cochise County, Arizona, USA
References
Luetcke, Rolf (n.d.) Personal communication.
 
and/or  
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