| Locality type: | Tunnel |
| Classification |
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| Species: | Bertrandite |
| Formula: | Be4(Si2O7)(OH)2 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Bertrandite data |
| Locality Data: | Click here to view Eureka Tunnel (1-15 pegmatite), St Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 508790 |
| Long-form Identifier: | 1:3:508790:7 |
| GUID (UUID V4): | aa194228-c18d-43ba-a263-d5f8a3f710de |
| Nearest other occurrences of Bertrandite |
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| 0.8km (0.5 miles) | ⓘCheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA |
| 0.8km (0.5 miles) | ⓘSt Peters Dome, Cheyenne Mining District (St. Peters Dome Mining District), El Paso County, Colorado, USA |
| 4.1km (2.5 miles) | ⓘHelen Hunt Falls, El Paso County, Colorado, USA |
| 6.0km (3.7 miles) | ⓘSpecimen Rock, El Paso County, Colorado, USA |
| 6.0km (3.7 miles) | ⓘSentinel rock (Specimen rock), Pikes Peak, El Paso County, Colorado, USA |
| 15.4km (9.6 miles) | ⓘPikes Peak, El Paso County, Colorado, USA |
| 33.8km (21.0 miles) | ⓘBlack Cloud Mine, Teller County, Colorado, USA |
| 42.9km (26.7 miles) | ⓘCrystal Peak, Teller County, Colorado, USA |
| 57.1km (35.5 miles) | ⓘLittle John Mine (Little John No. 1; Little John No. 2), Lake George Beryllium area (Badger Flats Beryllium area; Mountain Dale), Park County, Colorado, USA |
| 57.9km (36.0 miles) | ⓘMary Lea-Little Bear Mine (Mary Lee Mine; Little Bear No. 2 Mine), Lake George, Park County, Colorado, USA |
| References |
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