Where: Vietnam · Asia · approx. 11.99, 107.69 (vicinity only)
Why this spot: Rockhounding locality: volcanic opal/chalcedony
What turns up: Common opal, chalcedony, agate
Access: Gray area.
Unclaimed float may be found; digging on leases/farmland needs permission.
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.