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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Natromontebrasite from
Eight Mile Park, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA


09081310017366992988197.jpg
Natromontebrasite

Eight Mile Park, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
09081310017366992988197.jpg
Natromontebrasite

Eight Mile Park, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
09574740017271925419513.jpg
Natromontebrasite

Eight Mile Park, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
Locality type:Park
Classification
Species:'Natromontebrasite' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Natromontebrasite data
Locality Data:Click here to view Eight Mile Park, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:35074
Long-form Identifier:1:3:35074:7
GUID (UUID V4):0
Nearest other occurrences of Natromontebrasite
2.4km (1.5 miles) ⓘMeyers - McMullin pegmatite occurrence, Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
3.4km (2.1 miles) ⓘMeyers quarry (Meyers Quarry; Meyers-Halstead Quarry; Suzana Claims; Suzanna Claims; Royal Gorge No. 2), Eight Mile Park Pegmatite Mining District, Fremont County, Colorado, USA
References
Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
Eckel, Edwin Butt; Cobban, Robert R.; Mosburg, Shirley K.; Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.
 
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