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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Pumpellyite Subgroup from
Waldo Grade area, Marin County, California, USA


Locality type:Area
Classification
Species:'Pumpellyite Subgroup' (not an IMA approved species)
Formula:Ca2XAl2[Si2O6(OH)][SiO4](OH)2A
Comments:Occurs as pseudomorphs after olivine to 2 mm.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pumpellyite Subgroup data
Locality Data:Click here to view Waldo Grade area, Marin County, California, USA
Data Identifiers
Mindat Occurrence Record ID:684643
Long-form Identifier:1:3:684643:5
GUID (UUID V4):0
Nearest other occurrences of Pumpellyite Subgroup
6.8km (4.2 miles) ⓘReed Station, Tiburon Peninsula, Marin County, California, USA
28.4km (17.7 miles) ⓘUnnamed Pumpellyite occurrence [1], Novato, Marin County, California, USA
35.7km (22.2 miles) ⓘBlack Mountain Quarry, Black Mountain, Marin County, California, USA
76.7km (47.6 miles) ⓘCamp Meeker, Coast Range, Sonoma County, California, USA
94.7km (58.9 miles) ⓘWard Creek [2], Cazadero, Coast Range, Sonoma County, California, USA
References
Swanson, Samuel E., Schiffman, Peter (1979) Textural evolution and metamorphism of pillow basalts from the Franciscan Complex, western Marin County, California. Contributions to Mineralogy and Petrology, 69 (3) 291-299 doi:10.1007/bf00372331
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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