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| Description | |
|---|---|
| Quality of samples: | not specified / average specimens |
| Confirmation | |
| Validity: | Believed Valid |
| References | |
| References: | Langhof, J., Holtstam, D. & Gustafsson, L. (2000): Chiavennite and zoned genthelvite-helvite as late-stage minerals of the Proterozoic LCT pegmatites at Utö, Stockholm, Sweden. Geologiska Föreningens Förhandlingar 122, 207-212 |
| Data | |
| Mineral Data: | Click here to view Bertrandite data |
| Locality Data: | Click here to view Utö Mines, Utö, Södermanland, Sweden |