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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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Chrysocolla from
Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA


01460340017364408301834.jpg
Chrysocolla, etc.

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
05842880017364408308958.jpg
Chrysocolla, etc.

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
06015770017272035637458.jpg
Chrysocolla, etc.

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
03636650017272017732648.jpg
Chrysocolla, etc.

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
06015770017272035637458.jpg
Chrysocolla, etc.

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
03636650017272017732648.jpg
Chrysocolla, etc.

Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
Locality type:Pass
Classification
Species:Chrysocolla
Formula:Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Comments:this list encompasses several different environments of the Golden Horn Batholith at Washington Pass
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Agardite-(Y)
Associated Minerals Based on Photo Data:
Yarrowite4
Linarite1
Chamosite1
Quartz1
Data
Mineral Data:Click here to view Chrysocolla data
Locality Data:Click here to view Washington Pass, Golden Horn Batholith, Okanogan County, Washington, USA
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:46408
Long-form Identifier:1:3:46408:6
GUID (UUID V4):0
Nearest other occurrences of Chrysocolla
22.3km (13.9 miles) ⓘMazama Porphyry, Mazama Mining District, Okanogan County, Washington, USA
36.7km (22.8 miles) ⓘJones Prospect, Chewuch Mining District, Okanogan County, Washington, USA
44.2km (27.4 miles) ⓘEsmeralda Prospect, Phelps Ridge (Red Mountain), Chiwawa Mining District, Chelan County, Washington, USA
84.0km (52.2 miles) ⓘMackinaw Mine, Monte Cristo Mining District, Snohomish County, Washington, USA
89.1km (55.4 miles) ⓘDoris Prospect, North Fork of the Sultan River, Sultan Mining District, Snohomish County, Washington, USA
91.0km (56.6 miles) ⓘCopper Mountain Mine, Copper Mountain, Princeton, Similkameen Mining Division, British Columbia, Canada
References
Micro Probe Volume VI Number 8
 
and/or  
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