Where: Quebec · North America · approx. 46.7, -78.9 (vicinity only)
Why this spot: Grenville alkaline gneiss
What turns up: Eudialyte, agrellite, vlasovite, mosandrite, calcium REE-silicates
Access: Gray area.
Remote occurrence on Crown land near Lac Sheffield; float and outcrop collecting.
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.