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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Stilbite Subgroup from
Hercules Mine (Beryl claim; Hercules claim; Hercules group; Hercules prospect), Ramona, Ramona Mining District, San Diego County, California, USA


Locality type:Mine
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Comments:Occurs only from pocket pegmatite (open cavities or 'frozen' cavities).
Abundance at site:Rare
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Hercules Mine (Beryl claim; Hercules claim; Hercules group; Hercules prospect), Ramona, Ramona Mining District, San Diego County, California, USA
Data Identifiers
Mindat Occurrence Record ID:689573
Long-form Identifier:1:3:689573:0
GUID (UUID V4):0
Nearest other occurrences of Stilbite Subgroup
17.1km (10.6 miles) ⓘHimalaya Mine, Gem Hill, Mesa Grande Mining District, San Diego County, California, USA
26.7km (16.6 miles) ⓘVictor Mine (Big Buck mine; Big Buck prospect), Rincon Mountain, Rincon, Rincon Mining District, San Diego County, California, USA
44.0km (27.4 miles) ⓘOceanview Mine (Oceanview adits; new Oceanview workings), Elizabeth R. Mine (Hazel W. claim), Chief Mountain, Pala, Pala Mining District, San Diego County, California, USA
45.0km (28.0 miles) ⓘTourmaline Queen Mine, Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala Mining District, San Diego County, California, USA
45.3km (28.1 miles) ⓘTourmaline King Mine, Tourmaline Queen Mountain (Pala Mtn; Queen Mtn), Pala, Pala Mining District, San Diego County, California, USA
47.4km (29.4 miles) ⓘCalavera Quarry (G. M. Kelly Quarry), Carlsbad, San Diego County, California, USA
References
Foord, Eugene E., Martin, Robert F., Spaulding, Louis B., Mason, Roger A. (1989) Mineralogy and Paragenesis of the Little Three Mine Pegmatites, Ramona District, San Diego County, California. The Mineralogical Record, 20 (2) 101-127p.106
 
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