Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Tephroite from
Smith prospect, Limekiln, Spenceville Mining District, Nevada County, California, USA


Locality type:Mine
Classification
Species:Tephroite
Formula:Mn22+(SiO4)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Tephroite data
Locality Data:Click here to view Smith prospect, Limekiln, Spenceville Mining District, Nevada County, California, USA
Data Identifiers
Mindat Occurrence Record ID:1749488
Long-form Identifier:1:3:1749488:1
GUID (UUID V4):0
Nearest other occurrences of Tephroite
2.4km (1.5 miles) ⓘManga-Chrome Mine (Manga Chrome; Magna-Chrome Mine; Duggan Mine; Steams and Owens [?]), Limekiln, Spenceville Mining District, Nevada County, California, USA
2.5km (1.6 miles) ⓘSmith Mine (Smith prospect), Higgins Corner, Spenceville Mining District, Nevada County, California, USA
56.4km (35.0 miles) ⓘBenet prospect, Clipper Mills, Clipper Mills Mining District, Butte County, California, USA
56.5km (35.1 miles) ⓘBear Canyon Mine, Clipper Mills, Clipper Mills Mining District, Butte County, California, USA
69.8km (43.4 miles) ⓘGermolis prospect (Rodon; Rodonick; Germolie; Cormolis), Fiddletown (Oleta), Fiddletown Mining District (Oleta Mining District), Amador County, California, USA
70.7km (44.0 miles) ⓘLubanko prospect, Fiddletown (Oleta), Fiddletown Mining District (Oleta Mining District), Amador County, California, USA
References
Flohr, Marta J.K., Huebner, J.Stephen (1992) Mineralogy and geochemistry of two metamorphosed sedimentary manganese deposits, Sierra Nevada, California, USA. Lithos, 29 (1) 57-85 doi:10.1016/0024-4937(92)90034-v
 
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