Howard Springs, East Mayacmas Mining District, Lake County, California, USAi
| Regional Level Types | |
|---|---|
| Howard Springs | Group of Springs |
| East Mayacmas Mining District | Mining District |
| Lake County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 51' 30'' North , 122° 40' 25'' West
Latitude & Longitude (decimal):
Type:
Group of Springs
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Cobb | 1,778 (2011) | 5.9km |
| Lower Lake | 1,294 (2011) | 8.0km |
| Clear Lake Riviera | 3,090 (2017) | 11.4km |
| Hidden Valley Lake | 5,579 (2011) | 11.4km |
| Clearlake | 15,182 (2017) | 11.8km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Santa Rosa Mineral And Gem Society, Inc. | Santa Rosa, California | 47km |
A populated place (town).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities4 valid minerals. 1 erroneous literature entry.
Detailed Mineral List:
| ⓘ 'Asbestos' |
| ⓘ Chromite Formula: Fe2+Cr3+2O4 |
| ⓘ Cinnabar Formula: HgS |
| ⓘ Cordierite Formula: (Mg,Fe)2Al3(AlSi5O18) Colour: Amethystine Description: Mined for gems.
This material was documented as "amethystine quartz" by earlier authors (Averill; Symons); however, Brice later identified the material as cordierite. |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Formula: SiO2 Locality: Unnamed Gemstone occurrence [1], Howard Springs, East Mayacmas Mining District, Lake County, California, USA - erroneously reported |
| ⓘ Quartz var. Clear Lake Diamond Formula: SiO2 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Cinnabar | 2.CD.15a | HgS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| ⓘ | Quartz var. Amethyst ? | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
| ⓘ | var. Clear Lake Diamond | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Cordierite | 9.CJ.10 | (Mg,Fe)2Al3(AlSi5O18) |
| Unclassified | |||
| ⓘ | 'Asbestos' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz var. Amethyst | SiO2 |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Quartz var. Clear Lake Diamond | SiO2 |
| Mg | Magnesium | |
| Mg | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Al | Aluminium | |
| Al | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Si | Silicon | |
| Si | ⓘ Quartz var. Amethyst | SiO2 |
| Si | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Quartz var. Clear Lake Diamond | SiO2 |
| S | Sulfur | |
| S | ⓘ Cinnabar | HgS |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| Hg | Mercury | |
| Hg | ⓘ Cinnabar | HgS |
Localities in this Region
- California
- Lake County
- East Mayacmas Mining District
- Lake County
- California
- Lake County
- East Mayacmas Mining District
- Lake County
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- California Coast RangesAccretionary Complex
- Franciscan DomainDomain
USA
- California
- Mayacamas MountainsMountain Range
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
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Perini Hill, Howard Springs, East Mayacmas Mining District, Lake County, California, USA