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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Unspecified Calcite-Feldspar occurrence [1], Mendenhall Springs, Livermore Mining District (Tesla District), Alameda County, California, USAi
Regional Level Types
Unspecified Calcite-Feldspar occurrence [1]Occurrence
Mendenhall SpringsGroup of Springs
Livermore Mining District (Tesla District)Mining District
Alameda CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
37° North , 121° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~7km
GRN:
N26W69
Type:
Occurrence
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Mindat Locality ID:
211491
Long-form identifier:
mindat:1:2:211491:3
GUID (UUID V4):
0


Occurrence(s) located 16.65 miles up Mines Road from Tesla Road, SE of Livermore.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


2 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
Habit: Tabular, twinned
Colour: White
Description: Occurs as crystals to 2 cm diameter.
ⓘ Calcite
Formula: CaCO3
Habit: Flattened rhombohedra
Colour: Colorless
Description: Occurs as crystals to 1 cm on surfaces of metagraywacke.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 9 - Silicates
ⓘAlbite9.FA.35Na(AlSi3O8)

List of minerals for each chemical element

CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ CalciteCaCO3
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
CaCalcium
Caⓘ CalciteCaCO3

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. 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 mindat.org 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.

References

Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
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