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Ethel quarry, Stone Mountain-Lithonia Mining District, DeKalb County, Georgia, USAi
Regional Level Types
Ethel quarryQuarry
Stone Mountain-Lithonia Mining DistrictMining District
DeKalb CountyCounty
GeorgiaState
USACountry

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Latitude & Longitude (WGS84):
33° 48' 9'' North , 84° 7' 9'' West
Latitude & Longitude (decimal):
33.80275,-84.11928
GeoHash:
G#: dnh0mcd5q
GRN:
N23W50
Type:
Quarry
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Mountain Park11,554 (2011)4.7km
Stone Mountain6,109 (2017)4.7km
Redan33,015 (2011)6.5km
Pine Lake763 (2017)8.1km
Lilburn12,655 (2017)10.0km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Georgia Mineral Society, Inc.Norcross, Georgia18km
Cobb County Gem and Mineral SocietyMarietta, Georgia43km
Mindat Locality ID:
67399
Long-form identifier:
mindat:1:2:67399:7
GUID (UUID V4):
0


The Ethel quarry is located on a ten acre pavement of granite three miles east of the village of Stone Mountain. The quarry face is two hundred feet long in a northeasterly direction.

Small, disseminated pink garnets are found throughout the rock which is distinctly foliated biotite-bearing muscovite granite. Small, zoned aplite dikes have medium-grained muscovite borders and fine-grained white aplite centers. Irregular pegmatite pods contain small black tourmaline rosettes. Light green damourite occurs on several small slickensided faults.

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


4 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ 'Garnet Group'
Formula: X3Z2(SiO4)3
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Damourite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Opal var. Opal-AN
Formula: SiO2 · nH2O
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z
ⓘ Uranophane
Formula: Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘ Zoisite
Formula: (CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘ Zoisite var. Thulite
Formula: {Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘOpal
var. Opal-AN		4.DA.10SiO2 · nH2O
ⓘ4.DA.10SiO2 · nH2O
Group 9 - Silicates
ⓘUranophane9.AK.15Ca(UO2)2(SiO3OH)2 · 5H2O
ⓘZoisite
var. Thulite		9.BG.10{Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)
ⓘ9.BG.10(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Damourite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
ⓘ'Garnet Group'-X3Z2(SiO4)3

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ⓘ Opal var. Opal-ANSiO2 · nH2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ OpalSiO2 · nH2O
Hⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Hⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Hⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Hⓘ Muscovite var. DamouriteKAl2(AlSi3O10)(OH)2
BBoron
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
OOxygen
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ Opal var. Opal-ANSiO2 · nH2O
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ OpalSiO2 · nH2O
Oⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
Oⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Oⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Oⓘ Muscovite var. DamouriteKAl2(AlSi3O10)(OH)2
Oⓘ Garnet GroupX3Z2(SiO4)3
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Alⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Alⓘ Muscovite var. DamouriteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ Opal var. Opal-ANSiO2 · nH2O
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ OpalSiO2 · nH2O
Siⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Siⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Siⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
Siⓘ Muscovite var. DamouriteKAl2(AlSi3O10)(OH)2
Siⓘ Garnet GroupX3Z2(SiO4)3
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. DamouriteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
Caⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
Caⓘ Zoisite(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MnManganese
Mnⓘ Zoisite var. Thulite{Ca2}{Al,Mn33+}(Si2O7)(SiO4)O(OH)
FeIron
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
UUranium
Uⓘ UranophaneCa(UO2)2(SiO3OH)2 · 5H2O

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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References

[1]Herrmann, Leo Anthony (1954) Geology of the Stone Mountain-Lithonia District, Georgia. Bulletin 61. Geological Survey of Georgiap.92
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