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Deer Creek Chrysoprase Mine (Chrysoprase workings; Gemstone occurrence), Tennessee Knob, Tulare Co., California, USA

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Latitude & Longitude (WGS84): 35° 59' 48'' North , 118° 58' 4'' West
Latitude & Longitude (decimal): 35.9966666667, -118.967777778

A former semi-precious gemstone-Mn mine/deposit located in secs. 20 & 29, T22S, R28E, MDM, 2.3 km (1.4 miles) NNW of Tennessee Knob, near Deer Creek.

Mineral List

Regional Geology

Neogene2.588 - 23.03 MaNeogene sedimentary


Cretaceous66 - 145 MaCretaceous plutonic rocks

Plutonic rocks

Deep-seated to high-level intrusions are included. Many charnockites, anorthosites, and large ophiolites, classified as plutons, are distinguished in the database using the SIGNIF item. Ophiolites were classified as plutons, even where remnants may be extrusive and/or sedimentary.

Early Jurassic - Neoproterozoic174.1 - 1000 MaUltramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains)

Major:: {peridotite},Minor:: {serpentinite},Incidental:: {pyroxenite}

Ultramafic rocks, mostly serpentine. Minor peridotite, gabbro, and diabase. Chiefly Mesozoic unit 2

Tectonized ultramafic complexes in western Sierra Nevada and western Klamath Mts., primarily of Ordovician to Early Jurassic age. Characterized in large part by serpentinite-matrix melanges containing blocks and slabs of ultramafic and other rocks

References for regional geology:

Data provided by

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

USGS compilers. State geologic map data. State Maps.

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Kunz, George Frederick (1899), Precious stones: Mineral Resources U.S., 1898: 589.

Tucker, W. Burling (1919), Tulare Counties: California Mining Bureau. Report 15: 911.

Hamilton, Fletcher McNab (1922), eighteenth report of the State Mineralogist: California Mining Bureau. Report 18; 767 pp.: 247.

Goodwin, Joseph Grant (1958), Mines and mineral resources of Tulare County, California: California Journal of Mines and Geology: 54: 375-376.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 299, 318.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 350.

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