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Chalcedony from
Needle Peak (Sierra Aguja), Brewster County, Texas, USA


Locality type:Peak
Classification
Species:Quartz var: Chalcedony
Formula:SiO2
Comments:Pseudomorphs and coatings after twinned pseudohexagonal aragonite and pseudomorphs after scalenohedral calcite.
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Aragonite7
Data
Mineral Data:Click here to view Chalcedony data
Locality Data:Click here to view Needle Peak (Sierra Aguja), Brewster County, Texas, USA
Photo GalleryView Gallery (14 photos)
Data Identifiers
Mindat Occurrence Record ID:197915
Long-form Identifier:1:3:197915:2
GUID (UUID V4):0
Nearest other occurrences of Chalcedony
10.7km (6.6 miles) Little 38 Mine, Brewster County, Texas, USA
21.3km (13.2 miles) Fresno mine (Buena Suerte), Presidio County, Texas, USA
26.7km (16.6 miles) Unnamed prospect (EM-PR-U24-6), Solitario, Brewster County, Texas, USA
30.8km (19.2 miles) Christmas Mountain deposit (Piedra Azul), Christmas Mountains, Brewster County, Texas, USA
33.5km (20.8 miles) Agua Fria Ranch, Brewster County, Texas, USA
69.7km (43.3 miles) Unnamed prospects near Girvin Tank (PR-PR-T21-1), Presidio County, Texas, USA
95.0km (59.0 miles) Unnamed manganese occurrence, Roberts Ranch, Marathon, Brewster County, Texas, USA
References
 
and/or  
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