Dubník Opal Mines (Červenica), Slovakia

ROCKHOUNDING PERMISSION REQUIRED INFERRED

Where: Slovakia · Europe · approx. 48.8, 21.48 (vicinity only)

Why this spot: Rockhounding locality: precious opal in andesite

What turns up: precious opal, common opal, chalcedony

Access: Permission required.

Mine offers guided tours; independent collecting restricted.

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.