Ref.:
- Geological Survey of Canada Miscellaneous Survey 39.
- Sabina, A. P. (1982): Some rare minerals of the Bancroft area. Mineralogical Record 13, 223-228
In dolomitic crystaline limestone; in pegmatite.
The fluoborite-bearing crystalline limestone is in contact with red granite pegmatite and is exposed by a road-cut on the south side of the Crystal lake Road . Grey peristerite occurs in the pegmatite.