| Locality type: | Island |
| Classification |
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| Species: | Offretite |
| Formula: | KCaMg(Si13Al5)O36 · 15H2O |
| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Lévyne | ⓘ23 photos of Offretite associated with Lévyne at this locality. |
| Smectite Group | ⓘ21 photos of Offretite associated with Smectite Group at this locality. |
| Heulandite Subgroup | ⓘ4 photos of Offretite associated with Heulandite Subgroup at this locality. |
| Analcime | ⓘ1 photo of Offretite associated with Analcime at this locality. |
| Chabazite | ⓘ1 photo of Offretite associated with Chabazite at this locality. |
| Stilbite Subgroup | ⓘ1 photo of Offretite associated with Stilbite Subgroup at this locality. |
| Data |
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| Mineral Data: | Click here to view Offretite data |
| Locality Data: | Click here to view Elk Rock Island, Milwaukie, Clackamas County, Oregon, USA |
| Photo Gallery | View Gallery (3 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 113711 |
| Long-form Identifier: | 1:3:113711:8 |
| GUID (UUID V4): | 29f6bc4c-9ecc-4605-9566-afccab84d486 |
| Nearest other occurrences of Offretite |
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| 1.3km (0.8 miles) | ⓘSE Lava Drive, Milwaukie, Clackamas County, Oregon, USA |
| 1.7km (1.1 miles) | ⓘMilwaukie, Clackamas County, Oregon, USA |
| 67.4km (41.9 miles) | ⓘNeer Road, Goble, Columbia County, Oregon, USA |
| 86.4km (53.7 miles) | ⓘ200 / 237 Road Quarry, Wolf Point, Cowlitz County, Washington, USA |
| 94.8km (58.9 miles) | ⓘSignal Peak, Cowlitz County, Washington, USA |
| References |
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Elk Rock Island, Milwaukie, Clackamas County, Oregon, USA