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Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA i
Regional Level Types
Corundum Hill Hill
Newlin Township Township
Chester County County
Pennsylvania State
USA Country

Regional Level Types
Corundum Hill	Hill
Newlin Township	Township
Chester County	County
Pennsylvania	State
USA	Country

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Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Corundum

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Corundum

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Corundum

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Latitude & Longitude (WGS84):

39° 54' 36'' North , 75° 43' 5'' West

Latitude & Longitude (decimal):

Type:

Köppen climate type:

Cfa : Humid subtropical climate

Nearest Settlements:

Place	Population	Distance
Upland	2,895 (2017)	5.5km
Kennett Square	6,167 (2017)	7.1km
Modena	528 (2017)	9.1km
Toughkenamon	1,492 (2017)	9.4km
Thorndale	3,407 (2017)	9.5km

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

Club	Location	Distance
Delaware Mineralogical Society, Inc.	Wilmington, Delaware	23km
Tuscarora Lapidary Society	Brookhaven, Pennsylvania	29km
Delaware Valley Paleontological Society	Philadelphia, Pennsylvania	47km
Philadelphia Mineralogical Society	Philadelphia, Pennsylvania	47km
Delaware Valley Earth Science Society	Woodbury, New Jersey	49km

Mindat Locality ID:

4076

Long-form identifier:

mindat:1:2:4076:4

GUID (UUID V4):

Other/historical names associated with this locality:

Corundum Hill, Unionville, Chester County, Pennsylvania, USA

Occurrence in albite-corundum pegmatites.

Many older specimen labels and references refer to this locality as "Corundum Hill, Unionville" or simply "Unionville"

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

14 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

ⓘ 'Jasper'

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Grant, Raymond W. (Feb, 1971), "Pennsylvania Minerals (PM), PM(98), Keystone Newsletter.

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of PA, Inc.: 60

ⓘ Albite var. Oligoclase

Formula: (Na,Ca)[Al(Si,Al)Si₂O₈]

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Antigorite

Formula: Mg₃(Si₂O₅)(OH)₄

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Chromite

Formula: Fe²⁺Cr³⁺₂O₄

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Clinochlore

Formula: Mg₅Al(AlSi₃O₁₀)(OH)₈

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Corundum

Formula: Al₂O₃

References:

Grant, Raymond W. (Feb, 1971), "Pennsylvania Minerals (PM), PM(98), Keystone Newsletter.

Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of PA, Inc.: 60

ⓘ 'Deweylite'

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

✪ Diaspore

Formula: AlO(OH)

Habit: Doubly terminated crystals to 5cm

Colour: honey yellow to greenish yellow

References:

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

Jat Thompson Collection

ⓘ Goethite

Formula: Fe³⁺O(OH)

References:

Jat Thompson Collection

ⓘ Hematite

Formula: Fe₂O₃

References:

Jat Thompson Collection

ⓘ 'Limonite'

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Margarite

Formula: CaAl₂(Al₂Si₂O₁₀)(OH)₂

References:

Dana: Textbook of Mineralogy

1932rev. Pgs.666-7

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Muscovite var. Damourite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Paragonite

Formula: NaAl₂(AlSi₃O₁₀)(OH)₂

References:

Silliman, Benjamin, Jr. (1849), "Descriptions and Analyses of Several American Mins," Am. Jour. Sci., Vol. 8:381

Schaller, W. T., Stevens, R. E. (1941) The validity of paragonite as a mineral species. American Mineralogist, 26 (9) 541-545

Reed, Juliet C. (1976), Annotated Biblio. of Mins. New to the PA List 1965-1974, The Mineralogical Soc. of PA, Inc.: 59-60

ⓘ Quartz

Formula: SiO₂

Habit: small xtls to druzzy

Colour: green

Fluorescence: none

References:

Samual S. Gordon, (Dana, 1850, 654) 21pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Quartz var. Chalcedony

Formula: SiO₂

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ Quartz var. Prase

Formula: SiO₂

References:

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ 'Serpentine Subgroup'

Formula: D₃[Si₂O₅](OH)₄

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ 'Serpentine Subgroup var. Picrolite'

Formula: D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

ⓘ 'Tourmaline'

Formula: AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z

References:

Samual S. Gordon, pg. 173

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia

Gallery:

CaAl₂(Al₂Si₂O₁₀)(OH)₂ⓘ Margarite

Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

Margarite

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Goethite	4.00.	Fe³⁺O(OH)
ⓘ	Chromite	4.BB.05	Fe²⁺Cr³⁺₂O₄
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Corundum	4.CB.05	Al₂O₃
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Quartz var. Chalcedony	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	var. Prase	4.DA.05	SiO₂
ⓘ	Diaspore	4.FD.10	AlO(OH)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Paragonite	9.EC.15	NaAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Muscovite var. Damourite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Margarite	9.EC.30	CaAl₂(Al₂Si₂O₁₀)(OH)₂
ⓘ	Clinochlore	9.EC.55	Mg₅Al(AlSi₃O₁₀)(OH)₈
ⓘ	Antigorite	9.ED.15	Mg₃(Si₂O₅)(OH)₄
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Oligoclase	9.FA.35	(Na,Ca)[Al(Si,Al)Si₂O₈]
Unclassified
ⓘ	'Deweylite'	-
ⓘ	'Limonite'	-
ⓘ	'Tourmaline'	-	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
ⓘ	'Serpentine Subgroup'	-	D₃[Si₂O₅](OH)₄
ⓘ	'var. Picrolite'	-	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
H	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
H	ⓘ Diaspore	AlO(OH)
H	ⓘ Goethite	Fe³⁺O(OH)
H	ⓘ Margarite	CaAl₂(Al₂Si₂O₁₀)(OH)₂
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Paragonite	NaAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Muscovite var. Damourite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
H	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
B	Boron
B	ⓘ Tourmaline	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
O	ⓘ Quartz var. Chalcedony	SiO₂
O	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
O	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
O	ⓘ Corundum	Al₂O₃
O	ⓘ Diaspore	AlO(OH)
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Goethite	Fe³⁺O(OH)
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Margarite	CaAl₂(Al₂Si₂O₁₀)(OH)₂
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
O	ⓘ Paragonite	NaAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Tourmaline	AD₃G₆(T₆O₁₈)(BO₃)₃X₃Z
O	ⓘ Quartz var. Prase	SiO₂
O	ⓘ Muscovite var. Damourite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
O	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Na	ⓘ Paragonite	NaAl₂(AlSi₃O₁₀)(OH)₂
Mg	Magnesium
Mg	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
Mg	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Mg	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Al	ⓘ Corundum	Al₂O₃
Al	ⓘ Diaspore	AlO(OH)
Al	ⓘ Margarite	CaAl₂(Al₂Si₂O₁₀)(OH)₂
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Al	ⓘ Paragonite	NaAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Muscovite var. Damourite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Antigorite	Mg₃(Si₂O₅)(OH)₄
Si	ⓘ Quartz var. Chalcedony	SiO₂
Si	ⓘ Clinochlore	Mg₅Al(AlSi₃O₁₀)(OH)₈
Si	ⓘ Margarite	CaAl₂(Al₂Si₂O₁₀)(OH)₂
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Si	ⓘ Paragonite	NaAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Quartz var. Prase	SiO₂
Si	ⓘ Muscovite var. Damourite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Serpentine Subgroup	D₃[Si₂O₅](OH)₄
Si	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
K	Potassium
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Muscovite var. Damourite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Margarite	CaAl₂(Al₂Si₂O₁₀)(OH)₂
Ca	ⓘ Albite var. Oligoclase	(Na,Ca)[Al(Si,Al)Si₂O₈]
Cr	Chromium
Cr	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Mn	Manganese
Mn	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Fe	Iron
Fe	ⓘ Chromite	Fe²⁺Cr₂³⁺O₄
Fe	ⓘ Goethite	Fe³⁺O(OH)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Ni	Nickel
Ni	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn
Zn	Zinc
Zn	ⓘ Serpentine Subgroup var. Picrolite	D₃[Si₂O₅](OH)₄ D= Mg, Fe, Ni, Mn, Al, Zn

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

PedmontiaAccretionary Complex
Piedmontia DomainDomain

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

Silliman, Benjamin, Jr. (1849), "Descriptions and Analyses of Several American Minerals," American Journal of Science: 8: 381.

Smith, J. Lawrence and Brush, George J. (1853), "Reexamination of American Minerals, Part 1," American Journal of Science: 15: 209.

Ford, W.E. (1932), Dana's Textbook of Mineralogy, revised, John Wiley & Sons: 666-667.

Schaller, W. T., Stevens, R. E. (1941) The validity of paragonite as a mineral species. American Mineralogist, 26 (9) 541-545

Grant, Raymond W. (1971), "Pennsylvania Minerals" (PM), PM(98) (February), Keystone Newsletter.

Reed, Juliet C. (1976), Annotated Bibliography of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of Pennsylvania, Inc.: 59-60.

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Corundum Hill, Newlin Township, Chester County, Pennsylvania, USAiRegional Level TypesCorundum HillHill Newlin TownshipTownship Chester CountyCounty PennsylvaniaState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Mineral List

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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

Corundum Hill, Newlin Township, Chester County, Pennsylvania, USA i
Regional Level Types
Corundum Hill Hill
Newlin Township Township
Chester County County
Pennsylvania State
USA Country