| | Description | |
| Comments: | Occurs here uniquely in the trap quarries as masses of lustrous, white, platy crystals and cleavages | | Colour: | White | | Quality of samples: | not specified / average specimens | | Confirmation | |
| Validity: | Believed Valid | | References | |
| References: | Lapidary Jour.: 32:1700-1720, Mins. of the Watchungs, Part II, Vitali, G. (1978); NJ Geol. Survey Bull. #64, Trap Rock Mins. of NJ, Mason, B. (1960); Min. Rec.: 9:157-179., Peters, T.A. & Peters, J.J. (1978); Rocks & Min.: 59:157-183 (1984), Peters, J.J. | | Data | |
| Mineral Data: | Click here to view Baryte data | | Locality Data: | Click here to view Prospect Park Quarry (Sowerbutt Quarry; Vandermade Quarry; Warren Brothers Quarry), Prospect Park, Passaic Co., New Jersey, USA |
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