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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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Jadeite from
Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA


01173090017362256109137.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
07620920017272011002411.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
03234370017272011253187.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
04155870017272011286407.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
06964960017362256099159.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
07620920017272011002411.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
03234370017272011253187.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
04155870017272011286407.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
01173090017362256109137.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
08137280017272011299626.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
03234370017272011253187.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
04155870017272011286407.jpg
Jadeite

Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
Locality type:Occurrence
Classification
Species:Jadeite
Formula:Na(Al,Fe3+)Si2O6
Comments:Occurs as doubly-terminated crystals.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Jadeite data
Locality Data:Click here to view Rosenhahnite occurrence, Russian River, Cloverdale area, Mendocino County, California, USA
Photo GalleryView Gallery (7 photos)
Data Identifiers
Mindat Occurrence Record ID:135677
Long-form Identifier:1:3:135677:9
GUID (UUID V4):0
Nearest other occurrences of Jadeite
59.9km (37.2 miles) ⓘUnnamed Jade occurrence [1], Freestone, Coast Range, Sonoma County, California, USA
64.0km (39.8 miles) ⓘValley Ford, Sonoma County, California, USA
85.6km (53.2 miles) ⓘMassa Hill Mine, Vonsen Ranch, Marin County, California, USA
89.1km (55.4 miles) ⓘLaytonville Quarry, Laytonville, Coastal Range, California, USA
References
Wolfe, C.W. & Daphne Riska (1951), Crystallography of jadeite from near Cloverdale, California: (abstract): Geological Society of America Bulletin: 62: 1491
Wolfe, C. W. (1955) Crystallography of jadeite crystals from near Cloverdale, California. American Mineralogist, 40 (3-4) 248-260
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 309
Edgar, A.D., A. Mottana, and N.D. MacRae (1969) The chemistry of cell parameters of omphacite and related pyroxenes. Mineralogical Magazine: 37: 64, 67-68.
 
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