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
Original Old Dominion Mine (Keystone Mine; Keystone deposit; Keystone vein; Original Old Dominion vein), Pinal Creek, Burch, Globe Hills Mining District, Gila County, Arizona, USA


Locality type:Mine
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Colour:Blue, bluish-green (copper-stained)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Original Old Dominion Mine (Keystone Mine; Keystone deposit; Keystone vein; Original Old Dominion vein), Pinal Creek, Burch, Globe Hills Mining District, Gila County, Arizona, USA
Data Identifiers
Mindat Occurrence Record ID:239463
Long-form Identifier:1:3:239463:3
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
3.5km (2.2 miles) ⓘOld Dominion Mine, Buffalo Hill, Old Dominion vein system, Globe, Globe Hills Mining District, Gila County, Arizona, USA
8.0km (5.0 miles) ⓘInspiration Mine, Miami-Inspiration deposit, Inspiration, Miami-Inspiration Mining District, Gila County, Arizona, USA
8.2km (5.1 miles) ⓘInspiration pit, Inspiration Mine, Miami-Inspiration deposit, Inspiration, Miami-Inspiration Mining District, Gila County, Arizona, USA
9.0km (5.6 miles) ⓘBulldog tunnel (Bulldog shaft), Inspiration Mine, Miami-Inspiration deposit, Inspiration, Miami-Inspiration Mining District, Gila County, Arizona, USA
9.9km (6.1 miles) ⓘLive Oak shafts, Inspiration Mine, Miami-Inspiration deposit, Inspiration, Miami-Inspiration Mining District, Gila County, Arizona, USA
10.0km (6.2 miles) ⓘLive Oak pit, Inspiration Mine, Miami-Inspiration deposit, Inspiration, Miami-Inspiration Mining District, Gila County, Arizona, USA
35.2km (21.9 miles) ⓘUnnamed Chalcedony occurrence [1], Unnamed volcanic knob, Potts Canyon, Pinal County, Arizona, USA
36.4km (22.6 miles) ⓘRay Mine, Scott Mountain, Pinal County, Arizona, USA
42.4km (26.3 miles) ⓘReymert Mine, Reymert Canyon, Mineral Mountain Mining District, Pinal County, Arizona, USA
43.0km (26.7 miles) ⓘChristmas Mine, Christmas, Banner Mining District, Gila County, Arizona, USA
References
Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 85
 
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