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Coloma, Coloma Mining District, West Belt, El Dorado County, California, USAi
Regional Level Types
ColomaCensus-designated Place
Coloma Mining DistrictMining District
West Belt- not defined -
El Dorado CountyCounty
CaliforniaState
USACountry

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PhotosMapsSearchMineralogy
07160010017272300461166.jpg
View of the Coloma gold mining area, ca. 1950.

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
01471950017272300478849.jpg
View of the Coloma gold mining area, ca. 1960.

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
06150550017272300473270.jpg
Coloma Valley

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
07160010017272300461166.jpg
View of the Coloma gold mining area, ca. 1950.

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
01471950017272300478849.jpg
View of the Coloma gold mining area, ca. 1960.

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
06150550017272300473270.jpg
Coloma Valley

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
07160010017272300461166.jpg
View of the Coloma gold mining area, ca. 1950.

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
01471950017272300478849.jpg
View of the Coloma gold mining area, ca. 1960.

Coloma, Coloma Mining District, West Belt, El Dorado County, California, USA
Latitude & Longitude (WGS84):
38° 47' 59'' North , 120° 53' 21'' West
Latitude & Longitude (decimal):
38.80000,-120.88917
GRN:
N26W68
Type:
Census-designated Place
Köppen climate type:
Csa : Hot-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Coloma529 (2011)0.1km
Cold Springs446 (2011)6.7km
Placerville10,650 (2017)11.1km
Georgetown2,367 (2011)12.7km
Diamond Springs11,037 (2011)13.4km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
El Dorado County Mineral and Gem SocietyPlacerville, California11km
Gold Country Treasure SeekersPlacerville, California11km
Roseville Rock RollersRoseville, California35km
Fossils for Fun Society, Inc.North Highlands, California44km
Sacramento Valley Detecting BuffsNorth Highlands, California44km
Mindat Locality ID:
212994
Long-form identifier:
mindat:1:2:212994:8
GUID (UUID V4):
0


A populated place and former mining town along the American River.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

24 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded


Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Calcite
Formula: CaCO3
ⓘ Chromite
Formula: Fe2+Cr3+2O4
Localities: Reported from at least 9 localities in this region.
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Clinochlore var. Chromium-bearing Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
ⓘ Corundum
Formula: Al2O3
ⓘ Cronstedtite
Formula: Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Enstatite
Formula: Mg2Si2O6
ⓘ 'Fayalite-Forsterite Series'
ⓘ Forsterite
Formula: Mg2(SiO4)
ⓘ Hedenbergite
Formula: CaFe2+Si2O6
ⓘ Magnesiochromite
Formula: MgCr2O4
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Native Gold
Formula: Au
Localities: Reported from at least 13 localities in this region.
ⓘ Oldhamite
Formula: CaS
ⓘ Pentlandite
Formula: (NixFey)Σ9S8
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ Pyrrhotite
Formula: Fe1-xS
ⓘ Quartz
Formula: SiO2
Localities: Reported from at least 7 localities in this region.
ⓘ Roscoelite (TL)
Formula: KV3+2(AlSi3O10)(OH)2
Habit: radiating and foliated talc-like masses
Colour: Dark green; greenish grey in bulk, light greenish yellow in fragments
Description: Micaceous to ½ inch (1.25 cm) thick.
ⓘ Schreibersite
Formula: (Fe,Ni)3P
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ Sphalerite
Formula: ZnS
ⓘ Spinel
Formula: MgAl2O4
ⓘ Talc
Formula: Mg3Si4O10(OH)2
ⓘ Tochilinite
Formula: Fe2+5-6(Mg,Fe2+)5S6(OH)10
ⓘ Troilite
Formula: FeS

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
ⓘSchreibersite1.BD.05(Fe,Ni)3P
Group 2 - Sulphides and Sulfosalts
ⓘPentlandite2.BB.15(NixFey)Σ9S8
ⓘSphalerite2.CB.05aZnS
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘTroilite2.CC.10FeS
ⓘOldhamite2.CD.10CaS
ⓘTochilinite2.FD.35Fe2+5-6(Mg,Fe2+)5S6(OH)10
Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘMagnesiochromite4.BB.05MgCr2O4
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘSpinel4.BB.05MgAl2O4
ⓘCorundum4.CB.05Al2O3
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
ⓘForsterite9.AC.05Mg2(SiO4)
ⓘEnstatite9.DA.05Mg2Si2O6
ⓘDiopside9.DA.15CaMgSi2O6
ⓘHedenbergite9.DA.15CaFe2+Si2O6
ⓘTalc9.EC.05Mg3Si4O10(OH)2
ⓘRoscoelite (TL)9.EC.15KV3+2(AlSi3O10)(OH)2
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘvar. Chromium-bearing Clinochlore9.EC.55Mg5(Al,Cr)2Si3O10(OH)8
ⓘCronstedtite9.ED.15Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4
Unclassified
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Pyroxene Group'-ADSi2O6
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4

List of minerals for each chemical element

HHydrogen
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Hⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Hⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Hⓘ TalcMg3Si4O10(OH)2
Hⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
CCarbon
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ CalciteCaCO3
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ CorundumAl2O3
Oⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Oⓘ DiopsideCaMgSi2O6
Oⓘ DolomiteCaMg(CO3)2
Oⓘ EnstatiteMg2Si2O6
Oⓘ ForsteriteMg2(SiO4)
Oⓘ HedenbergiteCaFe2+Si2O6
Oⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Oⓘ MagnesiochromiteMgCr2O4
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ QuartzSiO2
Oⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Oⓘ SpinelMgAl2O4
Oⓘ TalcMg3Si4O10(OH)2
Oⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Oⓘ Fayalite-Forsterite Series
Oⓘ Pyroxene GroupADSi2O6
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
MgMagnesium
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ DolomiteCaMg(CO3)2
Mgⓘ EnstatiteMg2Si2O6
Mgⓘ ForsteriteMg2(SiO4)
Mgⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Mgⓘ MagnesiochromiteMgCr2O4
Mgⓘ SpinelMgAl2O4
Mgⓘ TalcMg3Si4O10(OH)2
Mgⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ CorundumAl2O3
Alⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Alⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Alⓘ SpinelMgAl2O4
SiSilicon
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Siⓘ DiopsideCaMgSi2O6
Siⓘ EnstatiteMg2Si2O6
Siⓘ ForsteriteMg2(SiO4)
Siⓘ HedenbergiteCaFe2+Si2O6
Siⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Siⓘ QuartzSiO2
Siⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
Siⓘ TalcMg3Si4O10(OH)2
Siⓘ Fayalite-Forsterite Series
Siⓘ Pyroxene GroupADSi2O6
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
PPhosphorus
Pⓘ Schreibersite(Fe,Ni)3P
SSulfur
Sⓘ OldhamiteCaS
Sⓘ Pentlandite(NixFey)Σ9S8
Sⓘ PyrrhotiteFe1-xS
Sⓘ SphaleriteZnS
Sⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Sⓘ TroiliteFeS
KPotassium
Kⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DiopsideCaMgSi2O6
Caⓘ DolomiteCaMg(CO3)2
Caⓘ HedenbergiteCaFe2+Si2O6
Caⓘ OldhamiteCaS
VVanadium
Vⓘ RoscoeliteKV23+(AlSi3O10)(OH)2
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
Crⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Crⓘ MagnesiochromiteMgCr2O4
FeIron
Feⓘ ChromiteFe2+Cr23+O4
Feⓘ CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
Feⓘ HedenbergiteCaFe2+Si2O6
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ Pentlandite(NixFey)Σ9S8
Feⓘ PyrrhotiteFe1-xS
Feⓘ Schreibersite(Fe,Ni)3P
Feⓘ TochiliniteFe2+5-6(Mg,Fe2+)5S6(OH)10
Feⓘ TroiliteFeS
Feⓘ Fayalite-Forsterite Series
NiNickel
Niⓘ Pentlandite(NixFey)Σ9S8
Niⓘ Schreibersite(Fe,Ni)3P
ZnZinc
Znⓘ SphaleriteZnS
AuGold
Auⓘ Native GoldAu

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Coloma,_California
Wikidata ID:Q1110351

Localities in this Region

USA
USA

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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