Bonetti Mine, Twin Peaks, Santa Clara County, California, USAi
| Regional Level Types | |
|---|---|
| Bonetti Mine | Mine |
| Twin Peaks | Group of Peaks |
| Santa Clara County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
37° 6' 38'' North , 121° 43' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Morgan Hill | 42,948 (2017) | 6.0km |
| San Martin | 7,027 (2011) | 9.9km |
| Day Valley | 3,409 (2011) | 15.3km |
| Corralitos | 2,326 (2011) | 15.7km |
| Amesti | 3,478 (2011) | 17.2km |
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 Clara Valley Gem & Mineral Society | San Jose, California | 30km |
| Santa Cruz Mineral and Gem Society | Santa Cruz, California | 32km |
| Peninsula Gem & Geology Society, Inc. | Los Altos, California | 47km |
| Salinas Valley Rock and Gem Club | Salinas, California | 48km |
A Cr occurrence located in the S½SE¼SE¼ sec. 26, T9S, R2E, MDM, 4.2 km (2.6 miles) NW of Twin Peaks (coordinates of record), and 6.0 km (3.7 miles) WSW of Morgan Hill, S of Chesbro Reservoir (on the divide between the Uvas and Chesbro Reservoirs). Discovered in 1885. Owned by H. Bonetti (1918). MRDS database stated accuracy for this location is 1,000 meters.
The ore occurs in a narrow, attenuated mass of serpentine that extends 18 miles along the eastern foothills, from Morgan Hill northward to San Jose. Local rocks include rocks of the Franciscan Complex, unit 1 (Coast Ranges) and/or ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains).
Workings include unspecified surface openings.
Production information: Less than 150 long tons of ore were produced.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| Unclassified | |||
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| O | Oxygen | |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Si | Silicon | |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10043405 |
|---|
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
- Santa Cruz 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
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.
