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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Pyrite from
Pacific Cement and Aggregate Company quarry, Santa Cruz, Santa Cruz County, California, USA


Locality type:Quarry
Classification
Species:Pyrite
Formula:FeS2
Comments:Occurs as well-formed crystals and massive; vein-like bodies.
Abundance at site:Common
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Chlorite Group
Sphalerite
Data
Mineral Data:Click here to view Pyrite data
Locality Data:Click here to view Pacific Cement and Aggregate Company quarry, Santa Cruz, Santa Cruz County, California, USA
Data Identifiers
Mindat Occurrence Record ID:135256
Long-form Identifier:1:3:135256:6
GUID (UUID V4):0
Nearest other occurrences of Pyrite
28.5km (17.7 miles) ⓘNew Almaden Mine (New Almaden Mines), New Almaden, New Almaden Mining District, Santa Clara County, California, USA
28.6km (17.8 miles) ⓘGuadalupe Mine, New Almaden, New Almaden Mining District, Santa Clara County, California, USA
28.6km (17.8 miles) ⓘSan Mateo Mine, New Almaden, New Almaden Mining District, Santa Clara County, California, USA
47.3km (29.4 miles) ⓘRianda Mine (Half Dome Mine), Pigeon Point, Santa Clara County, California, USA
51.0km (31.7 miles) ⓘSharon Park Drive outcrop, Sharon Heights, Menlo Park, San Mateo County, California, USA
71.3km (44.3 miles) ⓘComstock Mine, Pacheco Peak, Stayton Mining District (McLeod Mining District; Panoche Mining District), Santa Clara County, California, USA
72.0km (44.7 miles) ⓘAmbrose Mine (Rip Van Winkle Mine), Antimony Peak, Stayton Mining District (McLeod Mining District; Panoche Mining District), San Benito County, California, USA
73.4km (45.6 miles) ⓘGypsy Mine (Woody Mine), Antimony Peak, Stayton Mining District (McLeod Mining District; Panoche Mining District), Merced County, California, USA
73.9km (45.9 miles) ⓘTrampa Canyon prospect, Jamesburg, Santa Lucia Mts (Santa Lucia Range), Monterey County, California, USA
74.1km (46.0 miles) ⓘStayton Mine (Stayton Quicksilver Mine; Pacific claim of Stayton group), Antimony Peak, Stayton Mining District (McLeod Mining District; Panoche Mining District), Merced County, California, USA
References
Gross, Eugene B., Chesterman, Charles W., Dunning, Gail, Cooper, Joseph F. (1967) Mineralogy of the Kalkar quarry, Santa Cruz, California, in Short Contributions to California Geology. Special Report 92, California Division of Mines & Geology. 3-10p.6
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
Cooper, Joseph F., Dunning, Gail E. (1986) Mineralogy of the Kalkar Quarry, Santa Cruz, California. The Mineralogical Record, 17 (5) 315-326
Dunning G.E., Walstrom R.E., Lechner W. (2018) Barium Silicate Mineralogy of the Western Margin, North American Continent, Part 1: Geology, Origin, Paragenesis and Mineral Distribution from Baja California Norte Mexico, Western Canada and Alaska U.S.A. Bay Area Mineralogists Bulletin: 19(5), 70 pages.
 
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