| Classification |
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| Species: | Quartz var: Chalcedony |
| Formula: | SiO2 |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Quartz | 2 |
| - var Agate | 1 |
| Data |
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| Mineral Data: | Click here to view Chalcedony data |
| Locality Data: | Click here to view Marfa, Presidio County, Texas, USA |
| Photo Gallery | View Gallery (2 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 153382 |
| Long-form Identifier: | 1:3:153382:8 |
| GUID (UUID V4): | 0 |
| Localities for Chalcedony in this Region |
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| Bishop Ranch, Marfa, Presidio County, Texas, USA |
| Highway 169 Localities, Marfa, Presidio County, Texas, USA |
| Nearest other occurrences of Chalcedony |
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| 28.6km (17.8 miles) | ⓘSingleton Ranch, Presidio County, Texas, USA |
| 37.5km (23.3 miles) | ⓘCathedral Mountain quadrangle, Davis Mountains, Brewster County, Texas, USA |
| 43.8km (27.2 miles) | ⓘWoodward Ranch, Alpine, Brewster County, Texas, USA |
| 47.4km (29.4 miles) | ⓘKokernot o6 Ranch, Jeff Davis County, Texas, USA |
| 54.7km (34.0 miles) | ⓘUnspecified road cuts, Intersection Texas routes 118 & 166, Nunn Hill, Jeff Davis County, Texas, USA |
| 60.2km (37.4 miles) | ⓘUnnamed manganese occurrence, Roberts Ranch, Marathon, Brewster County, Texas, USA |
| 76.9km (47.8 miles) | ⓘClark prospect, Marathon, Brewster County, Texas, USA |
| 77.0km (47.8 miles) | ⓘMammoth Mine, Presidio County, Texas, USA |
| 79.2km (49.2 miles) | ⓘUnnamed prospects near Girvin Tank (PR-PR-T21-1), Presidio County, Texas, USA |
| 92.9km (57.7 miles) | ⓘAgua Fria Ranch, Brewster County, Texas, USA |
| References |
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Highway 169 Localities, Marfa, Presidio County, Texas, USA