Spokane Bar, Helena MT: sapphires

Where: West · North America · approx. 46.6, -111.9 (vicinity only)

Why this spot: Montana sapphire, garnet

What turns up: A Missouri River gravel bar east of Helena where alluvial sapphires are screened; several operations sell buckets of concentrate.

Access: Permission required.

Fee-dig site: pay to dig and keep what you find. Call ahead for hours, prices and what tools are allowed.

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.