| | Description | |
| Comments: | One specimen in the collections of the Mineralogisk-Geologisk Museum, Oslo, bought from Ad.Johannnesen in 1906. | | Habit: | elongated prisms with a trigonal appearance | | Colour: | brownish yellow | | Quality of samples: | not specified / average specimens | | Rarity at site: | Extremely Rare | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Neumann, H.; Bergstøl, S. & Nilssen, B.(1966)." Stillwellite in the Langesundfjord nepheline syenite pegmatite dykes ". Norsk Geologisk Tidsskrift 46: 327-334 | | Data | |
| Mineral Data: | Click here to view Stillwellite-(Ce) data | | Locality Data: | Click here to view Barkevikskjærene, Barkevik, Langesundsfjorden, Larvik, Vestfold, Norway |
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