| | Description | |
| Comments: | Occurs as grains in peridotite (Precambrian of Early Paleozoic). | | Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the PA List 1965-1974, The Min. Soc. of PA, Inc.: 40; Gordon, Samuel G. (1922), Mineralogy of PA: 88. | | Data | |
| Mineral Data: | Click here to view Forsterite data | | Locality Data: | Click here to view Castle Rock, Edgemont Township, Delaware Co., Pennsylvania, USA |
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