Log In
Lester River, Duluth, Saint Louis County, Minnesota, USAi
| Regional Level Types | |
|---|---|
| Lester River | River |
| Duluth | City |
| Saint Louis County | County |
| Minnesota | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Get Involved with mindat.org
Mindat.org has grown through countless contributions from mineral enthusiasts, collectors, researchers and experts around the world — people just like you.
Want to take part?
1
2
3
4
Contribute
Add photos, locality information and knowledge
Every contribution helps make mindat.org better for everyone.
Latitude & Longitude (WGS84):
46° 51' 52'' North , 91° 59' 48'' West
Latitude & Longitude (decimal):
Type:
River - last checked 2026
Köppen climate type:
No description has been added for this locality. Can you add one?
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
10 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Calcite Formula: CaCO3 References: Frank KarastiIdentified by Frank Karasti: Visual Identification, Visual (Fluorescence) |
| ⓘ Chalcopyrite Formula: CuFeS2 References: Frank KarastiIdentified by Frank Karasti: Visual Identification |
| ⓘ Cuprite Formula: Cu2O References: Frank KarastiIdentified by Frank Karasti: Visual Identification |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) References: Frank KarastiIdentified by Frank Karasti: Visual Identification |
| ⓘ Fluorite Formula: CaF2 References: Frank KarastiIdentified by Frank Karasti: Visual Identification, Visual (Fluorescence) |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 References: Frank KarastiIdentified by Frank Karasti: Visual Identification |
| ⓘ 'Mica Group' References: Frank KarastiIdentified by Frank Karasti: Visual Identification |
| ⓘ Native Copper Formula: Cu References: Frank KarastiIdentified by Frank Karasti: Visual Identification |
| ⓘ Pyrite Formula: FeS2 References: Frank KarastiIdentified by Frank Karasti: Visual Identification, Visual (Fluorescence) |
| ⓘ Pyrope Formula: Mg3Al2(SiO4)3 References: Frank KarastiIdentified by Frank Karasti: Visual Identification |
| ⓘ Quartz Formula: SiO2 References: Frank KarastiIdentified by Frank Karasti: Visual Identification, Visual (Fluorescence) |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| ⓘ | Pyrope | 9.AD.25 | Mg3Al2(SiO4)3 |
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Unclassified | |||
| ⓘ | 'Mica Group' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| O | ⓘ Quartz | SiO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Mg | Magnesium | |
| Mg | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| Al | Aluminium | |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| Si | Silicon | |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Pyrope | Mg3Al2(SiO4)3 |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mid-continent DomainDomain
- Mid-continent RiftNarrow Rift
USA
- Midcontinent RiftGeologic Province
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.
Lester River, Duluth, Saint Louis County, Minnesota, USA