| Locality type: | Valley |
| Classification |
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| Species: | Quartz var: Chalcedony |
| Formula: | SiO2 |
| Comments: | "seam agate" |
| Habit: | cryptocrystalline |
| Colour: | white, gray, blue |
| Abundance at site: | Common |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Quartz | 2 |
| - var Amethyst | 1 |
| Calcite | 1 |
| Goethite | 1 |
| Data |
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| Mineral Data: | Click here to view Chalcedony data |
| Locality Data: | Click here to view Walker Valley, Skagit County, Washington, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 469171 |
| Long-form Identifier: | 1:3:469171:6 |
| GUID (UUID V4): | 0 |
| Nearest other occurrences of Chalcedony |
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| 9.3km (5.8 miles) | ⓘMount Vernon Mine, Skagit County, Washington, USA |
| 63.6km (39.5 miles) | ⓘCadman Quarry, Monroe, Snohomish County, Washington, USA |
| 67.7km (42.1 miles) | ⓘBeaver Valley Quarry, Jefferson County, Washington, USA |
| 68.9km (42.8 miles) | ⓘCherry Creek Area, King County, Washington, USA |
| 81.8km (50.8 miles) | ⓘChilliwack River, Chilliwack, New Westminster Mining Division, British Columbia, Canada |
| 83.8km (52.1 miles) | ⓘFraser River gravels, Chilliwack, New Westminster Mining Division, British Columbia, Canada |
| 99.6km (61.9 miles) | ⓘBlack River Quarry, King County, Washington, USA |
| References |
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Walker Valley, Skagit County, Washington, USA