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Purple Diopside Mound (PDM), Rose Road, Pitcairn, St. Lawrence County, New York, USA i
Regional Level Types
Purple Diopside Mound (PDM) - not defined -
Rose Road Pegmatite
Pitcairn Town
St. Lawrence County County
New York State
USA Country

Regional Level Types
Purple Diopside Mound (PDM)	- not defined -
Rose Road	Pegmatite
Pitcairn	Town
St. Lawrence County	County
New York	State
USA	Country

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Productive collecting area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

View of the road from the productive collecting area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

View of Purple Diopside Locality from parking area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

Productive collecting area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

View of the road from the productive collecting area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

View of Purple Diopside Locality from parking area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

Productive collecting area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

View of the road from the productive collecting area

Purple Diopside Mound, Rose Road, Pitcairn, St. Lawrence County, New York, USA

Latitude & Longitude (WGS84):

44° 12' 5'' North , 75° 14' 3'' West

Latitude & Longitude (decimal):

44.20139,-75.23417

GRN:

N30W39

Köppen climate type:

Dfb : Warm-summer humid continental climate

Nearest Settlements:

Place	Population	Distance
Harrisville	622 (2017)	8.8km
Edwards	439 (2017)	13.7km
Star Lake	809 (2017)	16.8km
Hailesboro	624 (2017)	20.8km
Gouverneur	3,797 (2017)	23.6km

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

Club	Location	Distance
St. Lawrence County Rock & Mineral Club	Canton, New York	44km

Mindat Locality ID:

257354

Long-form identifier:

mindat:1:2:257354:3

GUID (UUID V4):

Important note: The Rose Road Localities are privately owned and generally closed to collecting during turkey hunting season.

Fee locality.

A mineral occurrence located along Rose Road, about 100 meters NW of the classic Mulvaney wollastonite-diopside locality, in a small hill.

This is a separate occurrence from the Mulvaney Property Locality and the Rose Road Boulders.

Zircon age is 1170 Ma.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

17 valid minerals.

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

Habit: Crystals to 1 cm.

Colour: White

Description: Also white masses in purple diopside.

References:

Chamberlain, Steve C., M.R. Walter, D.G. Bailey, J. Chiarenzelli & G.W. Robinson (2014), A new collecting site at the Rose Road Locality, Pitcairn, St. Lawrence County, New York, a presentation to the 41st. Rochester Mineralogical Symposium, April 25, 2014.

ⓘ Calcite

Formula: CaCO₃

References:

ⓘ Corundum

Formula: Al₂O₃

Colour: Deep purplish pink, red.

Description: Anhedral masses (ruby) to 5 mm in massive meionite.

References:

ⓘ Diopside

Formula: CaMgSi₂O₆

Habit: Prismatic to several cm.

Colour: Lavender/purple

Description: Also as fine-grained masses.

References:

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

Habit: Prismatic to 8 cm.

Colour: Bright blue-green

Description: Transparent.

References:

ⓘ Graphite

Formula: C

Habit: Hexagonal crystals and rosettes to several mm.

References:

ⓘ Marialite

Formula: Na₄Al₃Si₉O₂₄Cl

Colour: White

Description: Composition near 50-50 line. Occurs as white outer zones on gray meionite crystals.

References:

ⓘ Meionite

Formula: Ca₄Al₆Si₆O₂₄CO₃

Habit: Sharp, prismatic to 20 cm

Colour: Gray

Description: Composition near 50-50 line. crystals have transparent gray centers.

References:

ⓘ Natrolite

Formula: Na₂Al₂Si₃O₁₀ · 2H₂O

Habit: Radial crystal aggregates to 0.5 cm by 5 cm; masses of acicular crystals.

References:

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

References:

New Developments in the Study of the Purple Diopside Mound, Pitcairn, St. Lawrence County, New York. Chris Emproto. April 13th, 2019. 46th Annual Rochester Mineral Symposium.

ⓘ Phlogopite

Formula: KMg₃(AlSi₃O₁₀)(OH)₂

Colour: Honey-brown

Description: Transparent crystals, sometimes as masses of 20 cm or more and as pseudomorphs after meionite to 3 cm.

References:

ⓘ Prehnite

Formula: Ca₂Al₂Si₃O₁₀(OH)₂

Habit: Rounded, radial groups to 4 cm

Colour: Brown

Description: Occurs on a matrix of calcite, graphite and pyrite.

References:

ⓘ Pyrite

Formula: FeS₂

Habit: Filliform; modified cubes to 5 mm, as minute crystals, often altered to goethite, in "gieseckite", prehnite and meionite, and as oriented, parallel arrays ogf capillary crystals in meionite.

References:

ⓘ 'Pyrochlore Supergroup'

Formula: A_2-mD₂X_6-wZ_1-n

References:

New Developments in the Study of the Purple Diopside Mound, Pitcairn, St. Lawrence County, New York. Chris Emproto. April 13th, 2019. 46th Annual Rochester Mineral Symposium.

ⓘ 'Pyrochlore Supergroup var. Betafite (of Hogarth 1977)'

Formula: (Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)

References:

New Developments in the Study of the Purple Diopside Mound, Pitcairn, St. Lawrence County, New York. Chris Emproto. April 13th, 2019. 46th Annual Rochester Mineral Symposium.

ⓘ Sphalerite

Formula: ZnS

References:

New Developments in the Study of the Purple Diopside Mound, Pitcairn, St. Lawrence County, New York. Chris Emproto. April 13th, 2019. 46th Annual Rochester Mineral Symposium.

ⓘ Spinel

Formula: MgAl₂O₄

Habit: Octahedral to 1 mm

Colour: Pink

Description: Occurs with calcite and phlogopite.

References:

ⓘ Titanite

Formula: CaTi(SiO₄)O

Habit: Tabular, to 5 cm; minute crystals of complex morphology.

Colour: Dark brown, almost black

Description: Occurs in albite.

References:

ⓘ Zircon

Formula: Zr(SiO₄)

Habit: Minute, euhedral.

Description: Occurs as inclusions in Meionite.

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Graphite	1.CB.05a	C
Group 2 - Sulphides and Sulfosalts
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Spinel	4.BB.05	MgAl₂O₄
ⓘ	Corundum	4.CB.05	Al₂O₃
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Zircon	9.AD.30	Zr(SiO₄)
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Phlogopite	9.EC.20	KMg₃(AlSi₃O₁₀)(OH)₂
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	Marialite	9.FB.15	Na₄Al₃Si₉O₂₄Cl
ⓘ	Meionite	9.FB.15	Ca₄Al₆Si₆O₂₄CO₃
ⓘ	Natrolite	9.GA.05	Na₂Al₂Si₃O₁₀ · 2H₂O
Unclassified
ⓘ	'Pyrochlore Supergroup var. Betafite (of Hogarth 1977)'	-	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
ⓘ	''	-	A_2-mD₂X_6-wZ_1-n

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
H	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
H	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Graphite	C
C	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
O	ⓘ Calcite	CaCO₃
O	ⓘ Corundum	Al₂O₃
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Marialite	Na₄Al₃Si₉O₂₄Cl
O	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
O	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Spinel	MgAl₂O₄
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Zircon	Zr(SiO₄)
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
Na	ⓘ Marialite	Na₄Al₃Si₉O₂₄Cl
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Mg	Magnesium
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Mg	ⓘ Spinel	MgAl₂O₄
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Corundum	Al₂O₃
Al	ⓘ Marialite	Na₄Al₃Si₉O₂₄Cl
Al	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Al	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Al	ⓘ Spinel	MgAl₂O₄
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Marialite	Na₄Al₃Si₉O₂₄Cl
Si	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Natrolite	Na₂Al₂Si₃O₁₀ · 2H₂O
Si	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Zircon	Zr(SiO₄)
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
S	Sulfur
S	ⓘ Pyrite	FeS₂
S	ⓘ Sphalerite	ZnS
Cl	Chlorine
Cl	ⓘ Marialite	Na₄Al₃Si₉O₂₄Cl
K	Potassium
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
K	ⓘ Phlogopite	KMg₃(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Meionite	Ca₄Al₆Si₆O₂₄CO₃
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ti	Titanium
Ti	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
Ti	ⓘ Titanite	CaTi(SiO₄)O
Fe	Iron
Fe	ⓘ Pyrite	FeS₂
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS
Zr	Zirconium
Zr	ⓘ Zircon	Zr(SiO₄)
Nb	Niobium
Nb	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
Ta	Tantalum
Ta	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)
U	Uranium
U	ⓘ Pyrochlore Supergroup var. Betafite (of Hogarth 1977)	(Ca,Na,U)₂(Ti, Nb,Ta)₂O₆Z(OH)

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Grenville OrogenyOrogenic Belt
Shawnee DomainDomain

USA

New York
- Adirondack MountainsMassif

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

Chamberlain, S. C., Walter, M. R., Bailey, D. G., Chiarenzelli, J. R., Emproto, C. R., Robinson, G. W., & Lupulescu, M. (2021). The Rose Road Localities, Town of Pitcairn, St. Lawrence County New York: Part 4—Minerals of the Purple Diopside Mound. Rocks & Minerals, 96(6), 544–552. https://doi.org/10.1080/00357529.2021.1945385

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