Where: East Java · Asia · approx. -8.2, 111.1 (vicinity only)
Why this spot: Volcanic-hosted chalcedony/agate
What turns up: Chalcedony, agate, petrified wood (the 'akik' gemstone trade)
Access: Gray area.
Field and stream collecting in rural areas; local custom, buy at markets
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.