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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Opal from
Collecting Site Mine, Antelope Valley, Acton, Acton Mining District, Los Angeles County, California, USA


Locality type:Mine
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Collecting Site Mine, Antelope Valley, Acton, Acton Mining District, Los Angeles County, California, USA
Data Identifiers
Mindat Occurrence Record ID:328100
Long-form Identifier:1:3:328100:0
GUID (UUID V4):0
Nearest other occurrences of Opal
14.1km (8.8 miles) ⓘTick Canyon, Lang, Los Angeles County, California, USA
24.6km (15.3 miles) ⓘKatz Diatomaceous Shale prospect, Kagel Canyon, Los Angeles County, California, USA
45.0km (27.9 miles) ⓘNeuerberg locality 9, Cahuenga Boulevard roadcut, Cahuenga Pass, Hollywood, Hollywood Hills, Los Angeles, Los Angeles County, California, USA
58.7km (36.5 miles) ⓘFeatherstone deposit (Feather-Stone Insulation Company), Charter Oak, Los Angeles County, California, USA
59.4km (36.9 miles) ⓘCanwood St construction site 2014, Agoura Hills, Los Angeles County, California, USA
61.8km (38.4 miles) ⓘFillmore deposit, Fillmore, Ventura County, California, USA
62.9km (39.1 miles) ⓘArchstone, Agoura Hills, Los Angeles County, California, USA
66.5km (41.3 miles) ⓘRolling Oaks Drive, Thousand Oaks, Ventura County, California, USA
73.8km (45.8 miles) ⓘPoint Dume deposit, Point Dume, Malibu, Los Angeles County, California, USA
77.8km (48.3 miles) ⓘDicalite Mine (Walteria; Palos Verde Ranch; Dicalite Company), Rolling Hill Estates, Los Angeles County, California, USA
References
Oakeshott, Gordon Blaisdell (1958) Geology and mineral deposits of San Fernando quadrangle, Los Angeles County, California. California Division of Mines Bulletin 172, 147 pp.
 
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