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Idaho
Spencer Opal Mines, ID
Gem locality Source-confirmed findsPermission required
What you could find
Reported finds from this ground.
OpalPhotos via Wikimedia Commons: Dpulitzer (CC BY-SA 4.0).
Why this spot
Rockhounding locality: precious opal in banded rhyolite lithophysae
Long-operating precious-opal fee-dig, documented in guides and by the state geological survey.View source →
Before you go
Hazards noted for this site.
Mine dumps, sun exposure
Keep exploring nearby
More spots in this area.