| Locality type: | Mine |
| Classification |
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| Species: | 'Jasper' (not an IMA approved species) |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Jasper data |
| Locality Data: | Click here to view J. M. MacDonough Ranch Mine, Portola Valley, San Mateo County, California, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1208045 |
| Long-form Identifier: | 1:3:1208045:2 |
| GUID (UUID V4): | 35e502a8-7149-4da0-892a-c087a21af9bd |
| Nearest other occurrences of Jasper |
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| 40.4km (25.1 miles) | ⓘMateos Ranch occurrence, East Foothills, Black Wonder Mining District, Santa Clara County, California, USA |
| 45.5km (28.3 miles) | ⓘSan Francisco, San Francisco County, California, USA |
| 56.1km (34.8 miles) | ⓘNewman Estacia property, Cedar Mountain, Cedar Mountain Mining District, Alameda County, California, USA |
| 57.7km (35.8 miles) | ⓘNelson Bailey Mine (Nelson lease; Bailey Mine; Newhall Mine), Mendenhall Springs, Livermore Mining District (Tesla District), Alameda County, California, USA |
| 59.2km (36.8 miles) | ⓘAnderson Lake, Cochrane Ranch (Cochran Ranch) area, Cochrane Ranch (Cochran Ranch; Jackson Ranch), Morgan Hill, Santa Clara County, California, USA |
| 59.3km (36.9 miles) | ⓘBlack Jack Mine, Mendenhall Springs, Livermore Mining District (Tesla District), Alameda County, California, USA |
| 63.7km (39.6 miles) | ⓘFable Mine (Pacific Magnesite Company; Camp Bessie; Maltby; American Magnesite Company; Western Magnesite Development Company), Eylar Mountain, Black Wonder Mining District, Santa Clara County, California, USA |
| 63.7km (39.6 miles) | ⓘDoak No. 2 prospect (Doak #2; Blackhawk), Eylar Mountain, Black Wonder Mining District, Santa Clara County, California, USA |
| 69.4km (43.1 miles) | ⓘLadd Mine (Old Ladd Mine; Corral Hollow Mine; Carral Hollow Mine), Castle Rock, Ladd-Buckeye Mining District, San Joaquin County, California, USA |
| 71.1km (44.2 miles) | ⓘBlack Wonder section 28 group (Triple Jump claim; Black Eagle; may be: Cottonwood claims; Cottonwood deposit), Black Mountain, Black Wonder Mining District, Santa Clara County, California, USA |
| References |
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