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Elkhorn Mine (Tinsley Mine), Custer, Custer Mining District, Custer County, South Dakota, USA i
Regional Level Types
Elkhorn Mine (Tinsley Mine) Mine
Custer City
Custer Mining District Mining District
Custer County County
South Dakota State
USA Country

Regional Level Types
Elkhorn Mine (Tinsley Mine)	Mine
Custer	City
Custer Mining District	Mining District
Custer County	County
South Dakota	State
USA	Country

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View of Elkhorn Mine tailings

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

Elkhorn Mine workings, East pit

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

Beryl

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

View of Elkhorn Mine tailings

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

Elkhorn Mine workings, East pit

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

Beryl

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

View of Elkhorn Mine tailings

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

Elkhorn Mine workings, East pit

Elkhorn Mine, Custer, Custer Mining District, Custer County, South Dakota, USA

Latitude & Longitude (WGS84):

43° 44' 48'' North , 103° 31' 0'' West

Latitude & Longitude (decimal):

G#: 9xy2u7vkn

Type:

Köppen climate type:

Dfb : Warm-summer humid continental climate

Nearest Settlements:

Place	Population	Distance
Custer	1,952 (2017)	6.9km
Pringle	109 (2017)	16.6km
Keystone	343 (2017)	18.3km
Hill City	995 (2017)	21.2km
Hermosa	392 (2017)	28.1km

Nearest Clubs:
Local clubs are the best way to get access to collecting localities

Club	Location	Distance
Western Dakota Gem & Mineral Society	Rapid City, South Dakota	44km

Mindat Locality ID:

44835

Long-form identifier:

mindat:1:2:44835:5

GUID (UUID V4):

Granite pegmatite. 5 miles ESE of Custer

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

17 valid minerals.

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Staatz, M. H.

Norton, J. J.

Page, Lincoln R., Stocking, Hobart E., Smith, Harriet B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. Professional Paper 300. US Geological Survey doi:10.3133/pp300

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Albite var. Cleavelandite

Formula: Na(AlSi₃O₈)

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Alluaudite

Formula: (Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃

References:

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Andalusite

Formula: Al₂(SiO₄)O

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology

ⓘ Beryl

Formula: Be₃Al₂(Si₆O₁₈)

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Cassiterite

Formula: SnO₂

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

ⓘ Heterosite

Formula: (Fe³⁺,Mn³⁺)PO₄

References:

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Hureaulite

Formula: Mn²⁺₅(PO₃OH)₂(PO₄)₂ · 4H₂O

References:

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Kaolinite

Formula: Al₂(Si₂O₅)(OH)₄

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

ⓘ 'Limonite'

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

ⓘ Lithiophilite var. Sicklerite

Formula: Li_1-x(Mn³⁺_xMn²⁺_1-x)PO₄

References:

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Löllingite

Formula: FeAs₂

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Quartz

Formula: SiO₂

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Quartz var. Rose Quartz

Formula: SiO₂

References:

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Schorl

Formula: NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Sillimanite

Formula: Al₂(SiO₄)O

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

ⓘ Svanbergite

Formula: SrAl₃(PO₄)(SO₄)(OH)₆

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

ⓘ Triphylite

Formula: LiFe²⁺PO₄

Description: Mn/Mn + Fe = 0.28

References:

Staatz, M. H.

Norton, J. J.

Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

Smith, Arthur E., Fritzsch, Eric (2000) SOUTH DAKOTA. Rocks & Minerals, 75 (3) 156-169 doi:10.1080/00357520009605635

King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey.pp.333-336

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Löllingite	2.EB.15a	FeAs₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	var. Rose Quartz	4.DA.05	SiO₂
ⓘ	Cassiterite	4.DB.05	SnO₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Heterosite	8.AB.10	(Fe³⁺,Mn³⁺)PO₄
ⓘ	Lithiophilite var. Sicklerite	8.AB.10	Li_1-x(Mn³⁺_xMn²⁺_1-x)PO₄
ⓘ	Triphylite	8.AB.10	LiFe²⁺PO₄
ⓘ	Alluaudite	8.AC.10	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
ⓘ	Svanbergite	8.BL.05	SrAl₃(PO₄)(SO₄)(OH)₆
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
ⓘ	Hureaulite	8.CB.10	Mn²⁺₅(PO₃OH)₂(PO₄)₂ · 4H₂O
Group 9 - Silicates
ⓘ	Sillimanite	9.AF.05	Al₂(SiO₄)O
ⓘ	Andalusite	9.AF.10	Al₂(SiO₄)O
ⓘ	Beryl	9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ	Schorl	9.CK.05	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Kaolinite	9.ED.05	Al₂(Si₂O₅)(OH)₄
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Cleavelandite	9.FA.35	Na(AlSi₃O₈)
Unclassified
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Limonite'	-
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Hureaulite	Mn₅²⁺(PO₃OH)₂(PO₄)₂ · 4H₂O
H	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
H	ⓘ Svanbergite	SrAl₃(PO₄)(SO₄)(OH)₆
Li	Lithium
Li	ⓘ Lithiophilite var. Sicklerite	Li_1-x(Mn_x³⁺Mn²⁺_1-x)PO₄
Li	ⓘ Triphylite	LiFe²⁺PO₄
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
B	Boron
B	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Alluaudite	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
O	ⓘ Andalusite	Al₂(SiO₄)O
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Cassiterite	SnO₂
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Heterosite	(Fe³⁺,Mn³⁺)PO₄
O	ⓘ Hureaulite	Mn₅²⁺(PO₃OH)₂(PO₄)₂ · 4H₂O
O	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Quartz var. Rose Quartz	SiO₂
O	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Lithiophilite var. Sicklerite	Li_1-x(Mn_x³⁺Mn²⁺_1-x)PO₄
O	ⓘ Sillimanite	Al₂(SiO₄)O
O	ⓘ Svanbergite	SrAl₃(PO₄)(SO₄)(OH)₆
O	ⓘ Triphylite	LiFe²⁺PO₄
O	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Alluaudite	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
Na	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Na	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Mg	Magnesium
Mg	ⓘ Alluaudite	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Andalusite	Al₂(SiO₄)O
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Al	ⓘ Sillimanite	Al₂(SiO₄)O
Al	ⓘ Svanbergite	SrAl₃(PO₄)(SO₄)(OH)₆
Al	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Andalusite	Al₂(SiO₄)O
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Quartz var. Rose Quartz	SiO₂
Si	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Sillimanite	Al₂(SiO₄)O
Si	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
P	Phosphorus
P	ⓘ Alluaudite	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
P	ⓘ Heterosite	(Fe³⁺,Mn³⁺)PO₄
P	ⓘ Hureaulite	Mn₅²⁺(PO₃OH)₂(PO₄)₂ · 4H₂O
P	ⓘ Lithiophilite var. Sicklerite	Li_1-x(Mn_x³⁺Mn²⁺_1-x)PO₄
P	ⓘ Svanbergite	SrAl₃(PO₄)(SO₄)(OH)₆
P	ⓘ Triphylite	LiFe²⁺PO₄
S	Sulfur
S	ⓘ Svanbergite	SrAl₃(PO₄)(SO₄)(OH)₆
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Alluaudite	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mn	Manganese
Mn	ⓘ Alluaudite	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
Mn	ⓘ Heterosite	(Fe³⁺,Mn³⁺)PO₄
Mn	ⓘ Hureaulite	Mn₅²⁺(PO₃OH)₂(PO₄)₂ · 4H₂O
Mn	ⓘ Lithiophilite var. Sicklerite	Li_1-x(Mn_x³⁺Mn²⁺_1-x)PO₄
Fe	Iron
Fe	ⓘ Alluaudite	(Na,Ca)Mn²⁺(Fe³⁺,Mn²⁺,Fe²⁺,Mg)₂(PO₄)₃
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Heterosite	(Fe³⁺,Mn³⁺)PO₄
Fe	ⓘ Löllingite	FeAs₂
Fe	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Fe	ⓘ Triphylite	LiFe²⁺PO₄
As	Arsenic
As	ⓘ Löllingite	FeAs₂
Sr	Strontium
Sr	ⓘ Svanbergite	SrAl₃(PO₄)(SO₄)(OH)₆
Sn	Tin
Sn	ⓘ Cassiterite	SnO₂

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Wyoming CratonCraton
Wyoming DomainDomain

USA

Black HillsMountain Range

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

Staatz, M. H.; Page, L. R.; Norton, J. J.; Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.

King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey.pp.333-336

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Select Mineral List Type

Mineral List

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References