Chrysoprase and Moss Opal deposits, River Pines, Fiddletown Mining District (Oleta Mining District), Amador County, California, USAi
| Regional Level Types | |
|---|---|
| Chrysoprase and Moss Opal deposits | Group of Deposits |
| River Pines | - not defined - |
| Fiddletown Mining District (Oleta Mining District) | Mining District |
| Amador County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 31' 51'' North , 120° 44' 38'' West
Latitude & Longitude (decimal):
Type:
Group of Deposits
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| River Pines | 379 (2011) | 1.7km |
| Fiddletown | 235 (2011) | 3.2km |
| Plymouth | 960 (2017) | 10.3km |
| Drytown | 167 (2011) | 13.9km |
| Volcano | 115 (2017) | 13.9km |
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 |
|---|---|---|
| Amador County Gem & Mineral Society | Sutter Creek, California | 16km |
| El Dorado County Mineral and Gem Society | Placerville, California | 23km |
| Gold Country Treasure Seekers | Placerville, California | 23km |
A gemstone occurrence located on private property in sec. 22, T8N, R11E, MDM, 1.7 km (1.1 miles) S of River Pines and 3.2 km (2.0 miles) NNE of Fiddletown, ESE of Pigeon Creek School. MRDS database stated accuracy for this location is 1,000 meters but the deposits stretch in both directions for approximately 2km to the northeast and to the southwest. All occurrences lie on private land with no public access.
Carlson, D.W. & W.B. Clark (1954) mentions two separate things:
Chrysoprase is found in veins and as replacement pods in silicified serpentine and volcanic rock. 1 mile south of River Pines east of the Pigeon Creek School.
Moss Opal is found associated with siliceous limonitic serpentine.
Local rocks include Calaveras Complex (meta-sedimentary and volcanic/meta-volcanic rocks). Ultramafic rocks unknown age. Merhten formation (Andesitic conglomerate, sandstone, and breccia). Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Chrysoprase' |
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 References: Ech Noch CollectionIdentified by Ech Noch: Visual Identification |
| ⓘ Opal Formula: SiO2 · nH2O |
| ⓘ Opal var. Moss Opal |
| ⓘ Quartz Formula: SiO2 References: Ech Noch CollectionIdentified by Ech Noch: Visual Identification Ech Noch Collection, Presuming blue quartz because the Magnesio-riebeckite included moss opal that occurs about 60 meters away. Identified by Ech Noch: Visual Identification, Inferred (explain how) |
| ⓘ Quartz var. Amethyst Formula: SiO2 References: Ech Noch CollectionIdentified by Ech Noch: Visual Identification |
| ⓘ Quartz var. Blue Quartz Formula: SiO2 References: Ech Noch CollectionIdentified by Ech Noch: Visual Identification, Inferred (explain how) Ech Noch Collection, Presuming blue quartz because the Magnesio-riebeckite included moss opal that occurs about 60 meters away. Identified by Ech Noch: Visual Identification, Inferred (explain how) |
| ⓘ Quartz var. Chalcedony Formula: SiO2 References: Ech Noch CollectionIdentified by Ech Noch: Visual Identification |
| ⓘ Schorl Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) References: Ech Noch CollectionIdentified by Ech Noch: Visual Identification |
| ⓘ Tremolite Formula: ◻Ca2Mg5(Si8O22)(OH)2 References: Ech Noch CollectionIdentified by Ech Noch: Visual Identification |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz var. Amethyst | 4.DA.05 | SiO2 |
| ⓘ | var. Chalcedony | 4.DA.05 | SiO2 |
| ⓘ | 4.DA.05 | SiO2 | |
| ⓘ | var. Blue Quartz | 4.DA.05 | SiO2 |
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
| ⓘ | var. Moss Opal | 4.DA.10 | SiO2 · nH2O |
| Group 9 - Silicates | |||
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Tremolite | 9.DE.10 | ◻Ca2Mg5(Si8O22)(OH)2 |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Chrysoprase' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | Oxygen | |
| O | ⓘ Quartz var. Amethyst | SiO2 |
| O | ⓘ Quartz var. Chalcedony | SiO2 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| O | ⓘ Quartz var. Blue Quartz | SiO2 |
| Na | Sodium | |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | Magnesium | |
| Mg | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | Silicon | |
| Si | ⓘ Quartz var. Amethyst | SiO2 |
| Si | ⓘ Quartz var. Chalcedony | SiO2 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Si | ⓘ Quartz var. Blue Quartz | SiO2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
| Fe | Iron | |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
Other Databases
| Link to USGS MRDS: | 10259764 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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Chrysoprase and Moss Opal deposits, River Pines, Fiddletown Mining District, Amador County, California, USA