Unnamed Gemstone occurrence [1], Howard Springs, East Mayacmas Mining District, Lake County, California, USAi
| Regional Level Types | |
|---|---|
| Unnamed Gemstone occurrence [1] | Occurrence |
| 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° North , 122° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~3km
Type:
Köppen climate type:
A semi-precious gemstone occurrence located in secs. 10, 20 & 21, T12N, R7W, MDM, near Howard Springs (town).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 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. |
| ⓘ Formula: SiO2 |
| ⓘ Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz var. Amethyst ? | 4.DA.05 | SiO2 |
| ⓘ | ? | 4.DA.05 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Cordierite | 9.CJ.10 | (Mg,Fe)2Al3(AlSi5O18) |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz var. Amethyst | SiO2 |
| O | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
| O | ⓘ Quartz | 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 |
| Fe | Iron | |
| Fe | ⓘ Cordierite | (Mg,Fe)2Al3(AlSi5O18) |
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
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