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Lookout Mine (Hercules group; Lookout prospect; Upper Hercules mine), Ramona, Ramona Mining District, San Diego County, California, USAi
Regional Level Types
Lookout Mine (Hercules group; Lookout prospect; Upper Hercules mine)Mine
RamonaTown
Ramona Mining DistrictMining District
San Diego CountyCounty
CaliforniaState
USACountry

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PhotosMapsSearch
07961270017272081732806.jpg
Old Screen

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
09525340017272081735041.jpg
Old Trench

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
00796110017272081745368.jpg
Green Tourmaline Pocket

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
07961270017272081732806.jpg
Old Screen

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
09525340017272081735041.jpg
Old Trench

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
00796110017272081745368.jpg
Green Tourmaline Pocket

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
07961270017272081732806.jpg
Old Screen

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
09525340017272081735041.jpg
Old Trench

Lookout Mine, Ramona, Ramona Mining District, San Diego County, California, USA
Latitude & Longitude (WGS84):
33° 3' 37'' North , 116° 47' 27'' West
Latitude & Longitude (decimal):
33.06028,-116.79083
GRN:
N23W70
Type:
Mine
Köppen climate type:
Csa : Hot-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
San Diego Country Estates10,109 (2011)6.0km
Ramona20,292 (2011)7.5km
San Pasqual2,041 (2018)15.6km
Julian1,502 (2011)17.7km
Hidden Trails750 (2008)23.3km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Palomar Gem & Mineral ClubEscondido, California28km
El Cajon Valley Gem & Mineral SocietyEl Cajon, California34km
Borrego Rock and Gem ClubBorrego Springs, California44km
Vista Gem & Mineral SocietyVista, California45km
Mindat Locality ID:
55904
Long-form identifier:
mindat:1:2:55904:0
GUID (UUID V4):
0


Setting:
The Lookout mine is situated 7.4 km (4.6 miles) ENE of Ramona, and joins the Hercules mine on the northeast.

History:
A claim to the pegmatite deposit was first made by Samuel G. Ingle and Harry Titus, of San Diego, and Mr. Pray, of Escondido; in July, 1903.

Note: Work in progress to update this entry including more historic and modern development data, mineral species, references etc.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


16 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Albite var. Cleavelandite
Formula: Na(AlSi3O8)
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
ⓘ 'Almandine-Spessartine Series'
ⓘ Beryl
Formula: Be3Al2(Si6O18)
ⓘ Beryl var. Aquamarine
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ 'Clay minerals'
ⓘ Clinozoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘ Cookeite
Formula: (LiAl4◻)[AlSi3O10](OH)8
ⓘ Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ 'Elbaite-Schorl Series'
ⓘ 'Feldspar Group'
ⓘ 'Feldspar Group var. Perthite'
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Grossular ?
Formula: Ca3Al2(SiO4)3
Description: Most likely almandine-spessartine series.
ⓘ Grossular var. Hessonite ?
Formula: Ca3Al2(SiO4)3
Description: Most likely almandine-spessartine series.
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ 'K Feldspar'
ⓘ 'K Feldspar var. Adularia'
Formula: KAlSi3O8
ⓘ 'Lepidolite'
ⓘ 'Manganese Oxides'
ⓘ 'Mica Group'
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Orthoclase
Formula: K(AlSi3O8)
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Smoky Quartz
Formula: SiO2
ⓘ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘ Spessartine
Formula: Mn2+3Al2(SiO4)3
ⓘ Stibiotantalite
Formula: Sb3+TaO4
ⓘ 'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
ⓘ 'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘvar. Smoky Quartz4.DA.05SiO2
ⓘStibiotantalite4.DE.30Sb3+TaO4
Group 9 - Silicates
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘGrossular ?9.AD.25Ca3Al2(SiO4)3
ⓘvar. Hessonite ?9.AD.25Ca3Al2(SiO4)3
ⓘSpessartine9.AD.25Mn2+3Al2(SiO4)3
ⓘClinozoisite9.BG.05a(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘBeryl
var. Aquamarine		9.CJ.05Be3Al2(Si6O18)
ⓘ9.CJ.05Be3Al2(Si6O18)
ⓘElbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘSchorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘMontmorillonite9.EC.40(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
ⓘCookeite9.EC.55(LiAl4◻)[AlSi3O10](OH)8
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘOrthoclase9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Cleavelandite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'K Feldspar
var. Adularia'		-KAlSi3O8
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Clay minerals'-
ⓘ'Feldspar Group'-
ⓘ'Lepidolite'-
ⓘ'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
ⓘ'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
ⓘ'Feldspar Group
var. Perthite'		-
ⓘ'Mica Group'-
ⓘ'Almandine-Spessartine Series'-
ⓘ'Elbaite-Schorl Series'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'K Feldspar'-
ⓘ'Garnet Group'-X3Z2(SiO4)3
ⓘ'Manganese Oxides'-

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hⓘ Cookeite(LiAl4◻)[AlSi3O10](OH)8
Hⓘ ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Hⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hⓘ Elbaite-Schorl Series
LiLithium
Liⓘ Cookeite(LiAl4◻)[AlSi3O10](OH)8
Liⓘ ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Liⓘ Elbaite-Schorl Series
BeBeryllium
Beⓘ BerylBe3Al2(Si6O18)
BBoron
Bⓘ ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Bⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
Bⓘ Elbaite-Schorl Series
OOxygen
Oⓘ K Feldspar var. AdulariaKAlSi3O8
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oⓘ Cookeite(LiAl4◻)[AlSi3O10](OH)8
Oⓘ ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ GrossularCa3Al2(SiO4)3
Oⓘ Grossular var. HessoniteCa3Al2(SiO4)3
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ MicroclineK(AlSi3O8)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Oⓘ OrthoclaseK(AlSi3O8)
Oⓘ QuartzSiO2
Oⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oⓘ Quartz var. Smoky QuartzSiO2
Oⓘ SpessartineMn32+Al2(SiO4)3
Oⓘ StibiotantaliteSb3+TaO4
Oⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
Oⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
Oⓘ Albite var. CleavelanditeNa(AlSi3O8)
Oⓘ Almandine-Spessartine Series
Oⓘ Elbaite-Schorl Series
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Garnet GroupX3Z2(SiO4)3
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Naⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naⓘ Albite var. CleavelanditeNa(AlSi3O8)
Naⓘ Elbaite-Schorl Series
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
AlAluminium
Alⓘ K Feldspar var. AdulariaKAlSi3O8
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alⓘ Cookeite(LiAl4◻)[AlSi3O10](OH)8
Alⓘ ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ GrossularCa3Al2(SiO4)3
Alⓘ Grossular var. HessoniteCa3Al2(SiO4)3
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Alⓘ OrthoclaseK(AlSi3O8)
Alⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alⓘ SpessartineMn32+Al2(SiO4)3
Alⓘ Albite var. CleavelanditeNa(AlSi3O8)
Alⓘ Almandine-Spessartine Series
Alⓘ Elbaite-Schorl Series
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ K Feldspar var. AdulariaKAlSi3O8
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ AlmandineFe32+Al2(SiO4)3
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ BerylBe3Al2(Si6O18)
Siⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siⓘ Cookeite(LiAl4◻)[AlSi3O10](OH)8
Siⓘ ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ GrossularCa3Al2(SiO4)3
Siⓘ Grossular var. HessoniteCa3Al2(SiO4)3
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Siⓘ OrthoclaseK(AlSi3O8)
Siⓘ QuartzSiO2
Siⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siⓘ Quartz var. Smoky QuartzSiO2
Siⓘ SpessartineMn32+Al2(SiO4)3
Siⓘ Albite var. CleavelanditeNa(AlSi3O8)
Siⓘ Almandine-Spessartine Series
Siⓘ Elbaite-Schorl Series
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Garnet GroupX3Z2(SiO4)3
KPotassium
Kⓘ K Feldspar var. AdulariaKAlSi3O8
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ OrthoclaseK(AlSi3O8)
CaCalcium
Caⓘ Clinozoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Caⓘ GrossularCa3Al2(SiO4)3
Caⓘ Grossular var. HessoniteCa3Al2(SiO4)3
Caⓘ Montmorillonite(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MnManganese
Mnⓘ SpessartineMn32+Al2(SiO4)3
Mnⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
Mnⓘ Almandine-Spessartine Series
FeIron
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
Feⓘ Almandine-Spessartine Series
Feⓘ Elbaite-Schorl Series
NbNiobium
Nbⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6
SbAntimony
Sbⓘ StibiotantaliteSb3+TaO4
TaTantalum
Taⓘ StibiotantaliteSb3+TaO4
Taⓘ Tantalite(Mn,Fe)(Ta,Nb)2O6

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America Plate
Pacific PlateTectonic Plate

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References

Kunz, George F. (1905) Gems, Jewelers' Materials, and Ornamental Stones of California. Bulletin 37 (2nd ed.) California State Mining Bureaupp.148-149
Merrill, F. J. H. (1914), Geology and Mineral Resources of San Diego and Imperial Counties: Gems, Lithia Minerals. California State Mining Bureau, San Francisco, Cal. California State Printing Office, December. Chapter 1: 63, 72.
Weber, F. Harold Jr. (1963) Geology and mineral resources of San Diego County, California. County Report 3. California Division of Mines and Geology p.5
Murdoch, Joseph & Webb, Robert W. (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 195.
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
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