Crystal Mine [3] (El Dorado Crystal Mine), Frenchtown, Shingle Springs Mining District, West Belt, El Dorado County, California, USAi
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Latitude & Longitude (WGS84):
38° 38' 6'' North , 120° 54' 39'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Shingle Springs | 4,432 (2011) | 3.7km |
| Cameron Park | 18,228 (2011) | 7.6km |
| Deer Park | 1,384 (2018) | 9.2km |
| Diamond Springs | 11,037 (2011) | 10.6km |
| Cold Springs | 446 (2011) | 12.4km |
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 |
|---|---|---|
| El Dorado County Mineral and Gem Society | Placerville, California | 14km |
| Gold Country Treasure Seekers | Placerville, California | 14km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 29km |
| Roseville Rock Rollers | Roseville, California | 35km |
| Fossils for Fun Society, Inc. | North Highlands, California | 40km |
A former lode Au occurrence/mine located in the NE¼SE¼ sec. 18, T9N, R10E, MDM, 0.7 km (0.4 mile) S of Frenchtown and 3.7 km (2.3 miles) SSE of Shingle Springs, on private land. Operated prior to 1890, during the early 1890's, and during the period 1937 to 1940. MRDS database stated accuracy for this location is 100 meters.
Mineralization is a vein deposit in the West Gold Belt, hosted in schist and amphibolite. The ore body strikes N and dips 42E at a thickness of 3.66 meters. The vein is irregular, with an ore shoot 8 to 24 feet in width and up to 280 feet long on the 326 foot level. Controls for ore emplacement included deposition of vein material into cracks and cavities due to disruption by intrusions to the W. Gabbrodiorite lies to the W. Quartz crystals occur in cavities. Local rocks include pre-Cenozoic metasedimentary and metavolcanic rocks undivided.
Workings include underground openings comprised of a 250 foot inclined shaft and a 1,028 foot adit driven N, plus a 480 foot inclined winze sunk from the adit 328 feet from its portal, with levels at 200, 326 and 456 feet.
No production record was found.
The ore carried up to $11 (period values) per ton of Au.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ 'Feldspar Group' |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Unclassified | |||
| ⓘ | 'Feldspar Group' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10101084 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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