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
Portland Prospect, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA


Locality type:Prospect
Classification
Species:Quartz
Formula:SiO2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Quartz data
Locality Data:Click here to view Portland Prospect, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
Data Identifiers
Mindat Occurrence Record ID:587706
Long-form Identifier:1:3:587706:5
GUID (UUID V4):0
Nearest other occurrences of Quartz
2.8km (1.7 miles) ⓘReis Prospect, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
3.2km (2.0 miles) ⓘRoss Prospect, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
4.1km (2.5 miles) ⓘUnnamed Occurrence (ARDF - VA064; north of Tiekel), Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
5.3km (3.3 miles) ⓘEagle; Ellis; American Eagle Mine, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
6.9km (4.3 miles) ⓘKnowles; Knowles and Backman Property Prospect, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
7.2km (4.5 miles) ⓘUnnamed Prospect (ARDF - VA072; head of Glacier Creek), Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
8.6km (5.4 miles) ⓘUnnamed Prospect (ARDF - VA071; near Squaw Creek), Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
10.3km (6.4 miles) ⓘTelluride Prospect, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
11.3km (7.0 miles) ⓘWetzier; Quail Group Mine, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USA
11.9km (7.4 miles) ⓘTownsend and Holland Prospect, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USA
References
(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey
 
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