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Clear Creek claim (Clear Creek Mine), Picacho Peak, New Idria District, Diablo Range, San Benito Co., California, USA

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Latitude & Longitude (WGS84): 36° 23' 3'' North , 120° 44' 12'' West
Latitude & Longitude (decimal): 36.3841666667, -120.736666667

A former Hg mine located 6.1 km (3.8 miles) NW of Picacho Peak and 6.7 km (4.1 miles) WSW of Idria.

Eleven previously unknown mercury minerals have been found at the site.

Mineral List

49 valid minerals. 11 (TL) - type locality of valid minerals.

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.


Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 119, 173, 273 (locale described, not named).

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 181, 197 (locale described, not named).

Roberts, A.C., Ercit, T.S., Erd, R.C. & Oscarson, R.L. (1990): Szymańskiite, Hg1+16(Ni,Mg)6(CO3)12(OH)12(H3O)1+83H2O, a new mineral species from the Clear Creek claim, San Benito Co., California. Canadian Mineralogist: 28: 703-707.

Szymański, J.T. & Roberts, A.C. (1990): The crystal structure of szymańskiite, a partly disordered (Hg-Hg)2+, (Ni,Mg)2+ hydronium-carbonate-hydroxide-hydrate. Canadian Mineralogist: 28: 709-718.

Canadian Mineralogist (1993): 31: 787-793.

Mineralogical Record (1993): 24: 471-475.

Roberts, A.C., Ercit, T.S., Groat, L.A., Criddle, A.J., Erd, R.C. & Williams, R.S. (1995), Peterbaylissite, Hg1+3(CO3)(OH)2H2O, a new mineral species from Clear Creek claim, San Benito County, California. Canadian Mineralogist: 33: 47-53.

Canadian Mineralogist (1996): 34: 61-72.

Dunning, G.E. & Cooper, J.F. (2002): Pseudomorphic melanophlogites from California. Mineralogical Record 33: 237-242

Canadian Mineralogist (2003): 41(5): 1167-1172.

Lapis (2004): 29(2): 42.

Roberts, A.C., J.A.R. Stirling, A.J. Criddle, G.E. Dunning, J. Spratt (2004) Mineralogical Magazine: 68(2): 241-245.

Dunning, G.E. et al. (2005): The Clear Creek mine (San Benito County, California): a unique mercury locality. The Mineralogical Record: 36(4): 337-363.

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