| | Description | |
| Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 326. | | Data | |
| Mineral Data: | Click here to view Chalcedony data | | Locality Data: | Click here to view La Neuveville, Twann, Bern, Switzerland |
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