| Locality type: | Alluvials |
| Classification |
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| Species: | Quartz var: Agate |
| Formula: | SiO2 |
| Confirmation |
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| Validity: | Confirmed |
| Confirmation Methods: | Visually Identified |
| Data |
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| Mineral Data: | Click here to view Agate data |
| Locality Data: | Click here to view Chain of Rocks Gravel Bar, Madison County, Illinois, USA |
| Photo Gallery | View Gallery (7 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1214000 |
| Long-form Identifier: | 1:3:1214000:0 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Agate |
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| 28.4km (17.7 miles) | ⓘUnion Road, St. Louis County, Missouri, USA |
| 29.4km (18.3 miles) | ⓘDes Peres quarry, St. Louis County, Missouri, USA |
| 30.1km (18.7 miles) | ⓘLindbergh Boulevard and Interstate 55 Road intersection, St. Louis County, Missouri, USA |
| 32.7km (20.3 miles) | ⓘWeber Quarry, St. Louis County, Missouri, USA |
| 84.4km (52.4 miles) | ⓘRichwoods Barite District, Washington County, Missouri, USA |
| 90.1km (56.0 miles) | ⓘSouthwest Jefferson County barite and lead District, Jefferson County, Missouri, USA |
| 93.0km (57.8 miles) | ⓘBlackwell Mine, Tiff, Washington County, Missouri, USA |
| 93.7km (58.2 miles) | ⓘHaunted Ridge Mine, Cadet, Washington County Barite Mining District, Washington County, Missouri, USA |
| 96.3km (59.8 miles) | ⓘOld Mines area, Washington County, Missouri, USA |
| References |
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Chain of Rocks Gravel Bar, Madison County, Illinois, USA