| Locality type: | Road Cutting |
| Classification |
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| Species: | Quartz var: Chalcedony |
| Formula: | SiO2 |
| Comments: | UNion Road agate |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Chalcedony data |
| Locality Data: | Click here to view Lindbergh Boulevard and Interstate 55 Road intersection, St. Louis County, Missouri, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1081117 |
| Long-form Identifier: | 1:3:1081117:7 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Chalcedony |
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| 4.8km (3.0 miles) | ⓘRuprecht Quarry, St. Louis County, Missouri, USA |
| 6.2km (3.8 miles) | ⓘWeber Quarry, St. Louis County, Missouri, USA |
| 14.8km (9.2 miles) | ⓘDes Peres quarry, St. Louis County, Missouri, USA |
| 30.1km (18.7 miles) | ⓘChain of Rocks Gravel Bar, Madison County, Illinois, USA |
| 54.6km (33.9 miles) | ⓘLohr Quarry, Madison County, Illinois, USA |
| 55.3km (34.4 miles) | ⓘRichwoods Barite District, Washington County, Missouri, USA |
| 56.7km (35.3 miles) | ⓘKingston Mine, Washington County, Missouri, USA |
| 59.8km (37.1 miles) | ⓘDresser Mine No.10, Jefferson County, Missouri, USA |
| 61.4km (38.2 miles) | ⓘDresser No.4 Mine (Dresser No.4), Washington County, Missouri, USA |
| 66.1km (41.1 miles) | ⓘCadet Barite Mine, Cadet, Washington County Barite Mining District, Washington County, Missouri, USA |
| References |
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