| | Description | |
| Comments: | Rock forming mineral. Occurs in the Cardigan gneiss, Concentrator volcanics, and Cornelia quartz monzonite. A little broadleaved material associated with pegmatized part of the Cornelia quartz monzonite in the orebody. | | Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Thomas, W.J. & R.B. Gibbs (1983), Famous mineral localities: The New Cornelia mine, Ajo, AZ, Min.Rec.: 14: 283-298. | | Associated minerals: | |
| Associates: | Anhydrite
| | Data | |
| Mineral Data: | Click here to view Biotite data | | Locality Data: | Click here to view New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA |
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