| | Description | |
| Comments: | Crystals often covered partly by a greenish chlorite | | Habit: | thin tabular or platy crystals often in groups or radiating clusters up to 5mm | | Colour: | bright yellow transparent; pale yellow | | 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. GFF, Vol. 122 (Pt. 2, June), pp. 207-212. Stockholm. ISSN 1103-5897 | | Data | |
| Mineral Data: | Click here to view Chiavennite data | | Locality Data: | Click here to view Utö Island, Haninge, Stockholm, Södermanland, Sweden |
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