- Donnayite-(Y) (Type Locale)
- Mont St. Hilaire, Quebec, Canada
- Thumbnail, 1.2 x 1.0 x 0.7 cm
Here is a sharp, single, complete all around crystal of donnayite showing the unusual "stacking of plates" habit these crystals seem to grow in. Rare material, seldom seen in such sharp crystals. This may be coated with a thin layer of pyrite (?) .