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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Chalcedony from
North Star Mine (Northstar Mine), Kofa Mining District, Yuma County, Arizona, USA


Locality type:Mine
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Comments:Banded; a breccia cement.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Native Gold
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view North Star Mine (Northstar Mine), Kofa Mining District, Yuma County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:172159
Long-form Identifier:1:3:172159:1
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
9.6km (5.9 miles) ⓘC.O.D. Mine (C.O.D. prospect; C.O.D. group of claims), Red Raven Wash, Ocotillo Mine Group, Yuma County, Arizona, USA
11.6km (7.2 miles) ⓘRand prospect, Geyser lode, Ocotillo Mine Group, Yuma County, Arizona, USA
41.3km (25.6 miles) ⓘChocolate Mountains, La Paz County, Arizona, USA
42.6km (26.5 miles) ⓘBrenda, La Paz County, Arizona, USA
44.7km (27.7 miles) ⓘCastle Dome Mining District, Castle Dome Mountains, Yuma County, Arizona, USA
45.5km (28.2 miles) ⓘPlomosa Mountains, La Paz County, Arizona, USA
46.3km (28.8 miles) ⓘUnnamed Manganese prospects, Eagletail Mts (Cemetery Ridge) area, Yuma County, Arizona, USA
48.8km (30.3 miles) ⓘPerry Mine, Plomosa Mining District, Plomosa Mountains, La Paz County, Arizona, USA
54.2km (33.7 miles) ⓘHarquahala Mine, Bonanza and Golden Eagle Mine group, Martin Peak, Salome, La Paz County, Arizona, USA
62.6km (38.9 miles) ⓘRed Cloud Mine, Silver Mining District, La Paz County, Arizona, USA
References
Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 113-116
Wilson, E.D., et al (1934)(revised 1967), AZ Bur. Mines Bull. 137: 139-141.
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 88.
 
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