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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Hornblende Root Name Group from
Jordan Creek Placer, Yankee Fork Mining District, Custer County, Idaho, USA


Locality type:Placer
Classification
Species:'Hornblende Root Name Group' (not an IMA approved species)
Formula:◻Ca2(C42+C3+)(AlSi7O22)W2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Hornblende Root Name Group data
Locality Data:Click here to view Jordan Creek Placer, Yankee Fork Mining District, Custer County, Idaho, USA
Data Identifiers
Mindat Occurrence Record ID:448264
Long-form Identifier:1:3:448264:2
GUID (UUID V4):0
Nearest other occurrences of Hornblende Root Name Group
14.6km (9.1 miles) ⓘCentauras Workings Placer, Robinson Bar Mining District, Custer County, Idaho, USA
15.4km (9.6 miles) ⓘThe Great Centennial Placer, Robinson Bar Mining District, Custer County, Idaho, USA
40.9km (25.4 miles) ⓘMeadowview Prospect, East Fork Mining District, Custer County, Idaho, USA
68.7km (42.7 miles) ⓘDeadwood Mine, Deadwood Mining District, Valley County, Idaho, USA
86.6km (53.8 miles) ⓘBlackbird Mine, Blackbird mine complex, Blackbird Mining District, Lemhi County, Idaho, USA
References
 
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