Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Dolomite	5.AB.10	CaMg(CO₃)₂
Group 9 - Silicates
ⓘ	Diopside	9.DA.15	CaMgSi₂O₆
ⓘ	Tremolite	9.DE.10	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
ⓘ	Wollastonite	9.DG.05	Ca₃(Si₃O₉)
ⓘ	Prehnite	9.DP.20	Ca₂Al₂Si₃O₁₀(OH)₂
ⓘ	Talc	9.EC.05	Mg₃Si₄O₁₀(OH)₂
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Stevensite	9.EC.45	(Ca,Na)_xMg_3-x(Si₄O₁₀)(OH)₂
Unclassified
ⓘ	'Asbestos'	-
ⓘ	'Deweylite'	-
ⓘ	'Kerolite'	-	(Mg,Ni)₃Si₄O₁₀(OH)₂ · nH₂O (n ~ 1)
ⓘ	'Asbestos var. Mountain Leather'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
H	ⓘ Stevensite	(Ca,Na)_xMg_3-x(Si₄O₁₀)(OH)₂
H	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
H	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
H	ⓘ Kerolite	(Mg,Ni)₃Si₄O₁₀(OH)₂ · nH₂O (n ~ 1)
C	Carbon
C	ⓘ Calcite	CaCO₃
C	ⓘ Dolomite	CaMg(CO₃)₂
O	Oxygen
O	ⓘ Calcite	CaCO₃
O	ⓘ Diopside	CaMgSi₂O₆
O	ⓘ Dolomite	CaMg(CO₃)₂
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Stevensite	(Ca,Na)_xMg_3-x(Si₄O₁₀)(OH)₂
O	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
O	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
O	ⓘ Wollastonite	Ca₃(Si₃O₉)
O	ⓘ Kerolite	(Mg,Ni)₃Si₄O₁₀(OH)₂ · nH₂O (n ~ 1)
F	Fluorine
F	ⓘ Fluorite	CaF₂
Na	Sodium
Na	ⓘ Stevensite	(Ca,Na)_xMg_3-x(Si₄O₁₀)(OH)₂
Mg	Magnesium
Mg	ⓘ Diopside	CaMgSi₂O₆
Mg	ⓘ Dolomite	CaMg(CO₃)₂
Mg	ⓘ Stevensite	(Ca,Na)_xMg_3-x(Si₄O₁₀)(OH)₂
Mg	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Mg	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Mg	ⓘ Kerolite	(Mg,Ni)₃Si₄O₁₀(OH)₂ · nH₂O (n ~ 1)
Al	Aluminium
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	Silicon
Si	ⓘ Diopside	CaMgSi₂O₆
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Stevensite	(Ca,Na)_xMg_3-x(Si₄O₁₀)(OH)₂
Si	ⓘ Talc	Mg₃Si₄O₁₀(OH)₂
Si	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Si	ⓘ Wollastonite	Ca₃(Si₃O₉)
Si	ⓘ Kerolite	(Mg,Ni)₃Si₄O₁₀(OH)₂ · nH₂O (n ~ 1)
S	Sulfur
S	ⓘ Pyrite	FeS₂
K	Potassium
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Diopside	CaMgSi₂O₆
Ca	ⓘ Dolomite	CaMg(CO₃)₂
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Prehnite	Ca₂Al₂Si₃O₁₀(OH)₂
Ca	ⓘ Stevensite	(Ca,Na)_xMg_3-x(Si₄O₁₀)(OH)₂
Ca	ⓘ Tremolite	◻Ca₂Mg₅(Si₈O₂₂)(OH)₂
Ca	ⓘ Wollastonite	Ca₃(Si₃O₉)
Fe	Iron
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Pyrite	FeS₂
Ni	Nickel
Ni	ⓘ Kerolite	(Mg,Ni)₃Si₄O₁₀(OH)₂ · nH₂O (n ~ 1)

Fossils

There are 1 fossil locality from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences

Youngest Fossil Listed

0.01 Ma (Pleistocene)

Oldest Fossil Listed

0.01 Ma (Pleistocene)

Fossils from Region

Click here to show the list.

Accepted Name	Hierarchy	Age
Hyas genus	Animalia : Arthropoda : Malacostraca : Decapoda : Oregoniidae : *Hyas*	0.0117 - 0 Ma Quaternary

Fossil Localities

Click to show 1 fossil locality

USA

Maine
- Knox County
  - Quaternary🐚 MN Coastline

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Thomaston,_Maine
Wikidata ID:	Q3709204

Localities in this Region

USA

Maine
- Knox County
  - Thomaston

Other Regions, Features and Areas that Intersect

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.

Quick NavTop Commodities Mineral List Rock Types Fossils Other Databases Localities in Region Other Regions

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: October 22, 2026 09:35:05 Page updated: January 29, 2026 00:25:30

Go to top of page

Thomaston, Knox County, Maine, USAiRegional Level TypesThomastonTown Knox CountyCounty MaineState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

Select Mineral List Type

Commodity List

Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Fossils

Other Databases

Localities in this Region

Other Regions, Features and Areas that Intersect

Thomaston, Knox County, Maine, USA i
Regional Level Types
Thomaston Town
Knox County County
Maine State
USA Country