Quick Links : The Mindat Manual The Rock H. Currier Digital Library Mindat Newsletter [Free Download]

Home Page About Mindat The Mindat Manual History of Mindat Copyright Status Who We Are Contact Us Advertise on Mindat

Donate to Mindat Corporate Sponsorship Sponsor a Page Sponsored Pages Mindat Advertisers Advertise on Mindat

Learning Center What is a mineral?The most common minerals on earth Information for Educators Mindat Articles The Elements The Rock H. Currier Digital Library Geologic Time Explore Fossils

Minerals by Properties Minerals by Chemistry Mineral Visual Explorer Advanced Locality Search Random Mineral Random Locality Search by minID Localities Near Me Search Articles Search Glossary More Search Options

The Mindat Manual Add a New Photo Rate Photos Locality Edit Report Coordinate Completion Report Add Glossary Item

Mining Companies Statistics Users Mineral Museums Clubs & Organizations Mineral Shows & Events The Mindat Directory Device Settings The Mineral Quiz Time Machine

Photo Search Photo Galleries Search by Color Photo Colour Explorer New Photos Today New Photos Yesterday Members' Photo Galleries Past Photo of the Day Gallery Photography

PJ Keating Quarry (Dracut Quarry; Condon Quarry; Essex Bituminous), Dracut, Middlesex County, Massachusetts, USA i
Regional Level Types
PJ Keating Quarry (Dracut Quarry; Condon Quarry; Essex Bituminous) Quarry
Dracut Town
Middlesex County County
Massachusetts State
USA Country

Regional Level Types
PJ Keating Quarry (Dracut Quarry; Condon Quarry; Essex Bituminous)	Quarry
Dracut	Town
Middlesex County	County
Massachusetts	State
USA	Country

This page is currently not sponsored. Click here to sponsor this page.

Photos Maps Search

Standard

Specimen Photos (25)Photos by Color Gallery Photo Statistics Add Photo

Map Pages Nearest Localities Use Map in Article

Mineral Search Similar Localities Nearest Localities Predictive Mineralogy Search Google

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Calcite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Calcite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Calcite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Latitude & Longitude (WGS84):

42° 41' 47'' North , 71° 18' 48'' West

Latitude & Longitude (decimal):

Type:

Köppen climate type:

Dfb : Warm-summer humid continental climate

Nearest Settlements:

Place	Population	Distance
Dracut	28,831 (2017)	3.0km
Pelham	12,676 (2017)	4.3km
Lowell	110,699 (2017)	7.0km
Tyngsboro	11,366 (2017)	9.3km
Methuen	47,255 (2017)	10.6km

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

Club	Location	Distance
Nashoba Valley Mineralogical Society	Westford, Massachusetts	17km
North Shore Rock & Mineral Club of Massachusetts	South Hamilton, Massachusetts	37km
Boston Mineral Club, Inc.	Boston, Massachusetts	43km

Mindat Locality ID:

67295

Long-form identifier:

mindat:1:2:67295:2

GUID (UUID V4):

Crushed stone quarry operated by PJ Keating Company. Located on State Route 38 at the New Hampshire border. Owned by Essex Bituminous until acquired by P.J. Keating in 1978 (see timeline on web page cited below).

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.

ⓘ Aggregates

Mineral List

18 valid minerals.

Detailed Mineral List:

ⓘ 'Allanite Group'

Formula: (A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

ⓘ Almandine

Formula: Fe²⁺₃Al₂(SiO₄)₃

References:

P. Cristofono collection, 2013

ⓘ Calcite

Formula: CaCO₃

ⓘ Clinozoisite

Formula: (CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)

References:

P. Cristofono collection, 2013

ⓘ Diopside

Formula: CaMgSi₂O₆

References:

P. Cristofono collection, 2013

ⓘ Dolomite

Formula: CaMg(CO₃)₂

References:

Ed Clopton Collection #ELC1714Identified by Ed Clopton: Visual Identification, Dealer/Collection Label

ⓘ Epidote

Formula: (CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

P. Cristofono collection, 2013

ⓘ Fluorite

Formula: CaF₂

References:

P. Cristofono collection, 2013

ⓘ Grossular

Formula: Ca₃Al₂(SiO₄)₃

References:

P. Cristofono collection, 2013

ⓘ 'Heulandite Subgroup'

Formula: (Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O

References:

Paul Gilmore collection

ⓘ Microcline

Formula: K(AlSi₃O₈)

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

P. Cristofono collection, 2013

ⓘ Opal

Formula: SiO₂ · nH₂O

References:

P. Cristofono collection, 2013

ⓘ Opal var. Opal-AN

Formula: SiO₂ · nH₂O

References:

P. Cristofono collection, 2013

ⓘ Prehnite

Formula: Ca₂Al₂Si₃O₁₀(OH)₂

ⓘ Pyrite

Formula: FeS₂

References:

P. Cristofono collection, 2013

ⓘ Quartz

Formula: SiO₂

References:

P. Cristofono collection, 2013

ⓘ Scheelite

Formula: Ca(WO₄)

Fluorescence: bright blue-white (SW)

References:

P. Cristofono collection, 2013

ⓘ Schorl

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

ⓘ 'Stilbite Subgroup'

Formula: M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O

References:

Paul Gilmore collection

ⓘ Titanite

Formula: CaTi(SiO₄)O

References:

P. Cristofono collection, 2013

Gallery:

Ca₂Al₂Si₃O₁₀(OH)₂ⓘ Prehnite

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

Prehnite

PJ Keating Quarry, Dracut, Middlesex County, Massachusetts, USA

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Opal var. Opal-AN	4.DA.10	SiO₂ · nH₂O
ⓘ		4.DA.10	SiO₂ · nH₂O
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Scheelite	7.GA.05	Ca(WO₄)
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
Group 9 - Silicates
ⓘ	Almandine	9.AD.25	Fe²⁺₃Al₂(SiO₄)₃
ⓘ	Grossular	9.AD.25	Ca₃Al₂(SiO₄)₃
ⓘ	Titanite	9.AG.15	CaTi(SiO₄)O
ⓘ	Clinozoisite	9.BG.05a	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
ⓘ	Epidote	9.BG.05a	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
ⓘ	Schorl	9.CK.05	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
Unclassified
ⓘ	'Heulandite Subgroup'	-	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
ⓘ	'Stilbite Subgroup'	-	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
ⓘ	'Allanite Group'	-	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Clinozoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
H	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
H	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
H	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Opal	SiO₂ · nH₂O
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
H	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
H	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
H	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
B	Boron
B	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Dolomite	CaMg(CO₃)₂
O	Oxygen
O	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
O	ⓘ Calcite	CaCO₃
O	ⓘ Clinozoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
O	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
O	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Opal	SiO₂ · nH₂O
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Scheelite	Ca(WO₄)
O	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
O	ⓘ Titanite	CaTi(SiO₄)O
O	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
F	ⓘ Fluorite	CaF₂
Na	Sodium
Na	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Na	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Mg	Magnesium
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Al	Aluminium
Al	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Al	ⓘ Clinozoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Al	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Al	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Al	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Al	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Si	Silicon
Si	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Si	ⓘ Clinozoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Si	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Si	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Si	ⓘ Opal var. Opal-AN	SiO₂ · nH₂O
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Opal	SiO₂ · nH₂O
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Stilbite Subgroup	M_6-7[Al_8-9Si_27-28O₇₂] · nH₂O
Si	ⓘ Titanite	CaTi(SiO₄)O
Si	ⓘ Allanite Group	(A1²⁺REE³⁺)(M1³⁺M2³⁺M3²⁺)O[Si₂O₇][SiO₄](OH)
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
S	Sulfur
S	ⓘ Pyrite	FeS₂
K	Potassium
K	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Clinozoisite	(CaCa)(AlAlAl)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Grossular	Ca₃Al₂(SiO₄)₃
Ca	ⓘ Heulandite Subgroup	(Na/Ca/K)_5-6[Al_8-9 Si_27-28 O₇₂] · nH₂O
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Scheelite	Ca(WO₄)
Ca	ⓘ Titanite	CaTi(SiO₄)O
Ti	Titanium
Ti	ⓘ Titanite	CaTi(SiO₄)O
Fe	Iron
Fe	ⓘ Almandine	Fe₃²⁺Al₂(SiO₄)₃
Fe	ⓘ Epidote	(CaCa)(AlAlFe³⁺)O[Si₂O₇][SiO₄](OH)
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
W	Tungsten
W	ⓘ Scheelite	Ca(WO₄)

Mindat Articles

"Ladder Day" Collecting by Paul Gilmore

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Ganderia DomainDomain
GranderiaPassive Margin

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

(n.d.) Company web page: https://www.pjkeating.com/about/our-story.

Quick NavTop Commodities Mineral List Articles Other Regions References

Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 4, 2026 02:35:26 Page updated: November 14, 2025 14:33:32

Go to top of page