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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Calcite from
Patterson Pass, Livermore, Livermore Mining District (Tesla District), Alameda County, California, USA


Locality type:Pass
Classification
Species:Calcite
Formula:CaCO3
Comments:Occurs as pseudomorphs after aragonite.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Calcite data
Locality Data:Click here to view Patterson Pass, Livermore, Livermore Mining District (Tesla District), Alameda County, California, USA
Data Identifiers
Mindat Occurrence Record ID:645008
Long-form Identifier:1:3:645008:3
GUID (UUID V4):0
Nearest other occurrences of Calcite
10.0km (6.2 miles) ⓘCorral Hollow, Mendenhall Springs, Livermore Mining District (Tesla District), Alameda County, California, USA
27.3km (17.0 miles) ⓘBuckeye Mine (Buckeye Mines; Wright Mine), Mount Oso, Ladd-Buckeye Mining District, Stanislaus County, California, USA
28.0km (17.4 miles) ⓘLiberty Mine (Deer Park ?), Mount Oso, Ladd-Buckeye Mining District, Stanislaus County, California, USA
30.9km (19.2 miles) ⓘPerkins Canyon prospect [2] (Prospects in Perkins Canyon), North Peak, Mount Diablo (Mt Diablo), Clayton, Contra Costa County, California, USA
33.0km (20.5 miles) ⓘMount Diablo Mine, Mount Diablo (Mt Diablo), Clayton, Contra Costa County, California, USA
37.0km (23.0 miles) ⓘAdobe Canyon group deposits (McGuire et al. deposits; McGuire Holbrook and Springer Lea; Southeast; Mountain View Mine; Mountain View claim; Gray Fox claim), Copper Mountain, Black Wonder Mining District, Stanislaus County, California, USA
40.8km (25.4 miles) ⓘPennsylvania Mine, Sugarloaf Mountain, Black Wonder Mining District, Santa Clara County, California, USA
58.1km (36.1 miles) ⓘGuadalupe Mine, New Almaden, New Almaden Mining District, Santa Clara County, California, USA
58.9km (36.6 miles) ⓘNorth Randol Mine, New Almaden, New Almaden Mining District, Santa Clara County, California, USA
59.6km (37.1 miles) ⓘNew Almaden Mine (New Almaden Mines), New Almaden, New Almaden Mining District, Santa Clara County, California, USA
References
Rogers, Austin Flint (1910) Notes on some pseudomorphs, petrifactions and alterations. Proceedings of the American Philosophical Society, 49. 17-23
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 117.
 
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