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
Martin Marietta Quarry (Jamestown Quarry), Jamestown, Guilford County, North Carolina, USA


Locality type:Quarry
Classification
Species:'Stilbite Subgroup' (not an IMA approved species)
Formula:M6-7[Al8-9Si27-28O72] · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Stilbite Subgroup data
Locality Data:Click here to view Martin Marietta Quarry (Jamestown Quarry), Jamestown, Guilford County, North Carolina, USA
Data Identifiers
Mindat Occurrence Record ID:424101
Long-form Identifier:1:3:424101:0
GUID (UUID V4):0
Nearest other occurrences of Stilbite Subgroup
0.5km (0.3 miles) ⓘJamestown Quarry, Jamestown, Guilford County, North Carolina, USA
9.9km (6.1 miles) ⓘPomona Quarry, Pomona, Greensboro, Guilford County, North Carolina, USA
25.4km (15.8 miles) ⓘThomasville Quarry (Martin Marietta Quarry), Thomasville, Davidson County, North Carolina, USA
31.2km (19.4 miles) ⓘStokesdale Quarry (Vulcan-Stokesdale Quarry), Stokesdale, Guilford County, North Carolina, USA
54.4km (33.8 miles) ⓘEast Alamance Quarry, Haw River, Alamance County, North Carolina, USA
64.8km (40.3 miles) ⓘWoodleaf Quarry, Woodleaf, Rowan County, North Carolina, USA
References
Tschernich, Rudy W. (1992) Zeolites of the World. Geoscience Press, Inc. 567pp.
 
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