| | Description | |
| Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Collins, J.H. (1892): "A Handbook to the Mineralogy of Cornwall and Devon", 2nd ed., D. Bradford Barton Ltd. (Truro, UK), pp. 108. | | Data | |
| Mineral Data: | Click here to view Jasper data | | Locality Data: | Click here to view New Rosewarne Mine, Carnhell Green, Gwinear, St Erth - Gwithian Area, Cornwall, England, UK |
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