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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Lawsonite from
Hillsdale Mine (Chaboya-Hillsdale Mine; San Juan Bautista Mine; San Juan Mine; San Juan Quicksilver Mine; Sheboya Mine; Chapman Mine; Oak Hill Mine), Oak Hill, San Jose, Santa Clara County, California, USA


Locality type:Mine
Classification
Species:Lawsonite
Formula:CaAl2(Si2O7)(OH)2 · H2O
Comments:Together with glaucophane comprises almost the entirety of a lawsonite-glaucophane schist.
Confirmation
Validity:Believed Valid
Associated Minerals:
Associates:Glaucophane
Data
Mineral Data:Click here to view Lawsonite data
Locality Data:Click here to view Hillsdale Mine (Chaboya-Hillsdale Mine; San Juan Bautista Mine; San Juan Mine; San Juan Quicksilver Mine; Sheboya Mine; Chapman Mine; Oak Hill Mine), Oak Hill, San Jose, Santa Clara County, California, USA
Data Identifiers
Mindat Occurrence Record ID:677120
Long-form Identifier:1:3:677120:1
GUID (UUID V4):0
Nearest other occurrences of Lawsonite
18.0km (11.2 miles) ⓘSmith Creek, Alum Rock, Black Wonder Mining District, Santa Clara County, California, USA
30.4km (18.9 miles) ⓘUnnamed Lawsonite occurrence [1], Eylar Mountain, Black Wonder Mining District, Santa Clara County, California, USA
48.9km (30.4 miles) ⓘBuckeye Mine (Buckeye Mines; Wright Mine), Mount Oso, Ladd-Buckeye Mining District, Stanislaus County, California, USA
58.4km (36.3 miles) ⓘRoad West of the Pacheco Pass summit, Pacheco Pass, Santa Clara County, California, USA
88.5km (55.0 miles) ⓘReed Station, Tiburon Peninsula, Marin County, California, USA
References
Smith, James Perrin (1906), The paragenesis of the minerals in the glaucophane-bearing rocks of California: American Philosophical Society Proceedings: 45: 212
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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