Opal
Crowders Gully road, Coober Pedy, South Australia state, Australia
IMA approved name
Opal pseudomorph after bivalvia
Length of the left specimen: 15 mm. Opal pseudomorph after shell fossil. The translucent white part is opal replacing bivalvia fossil.
Recovered from the weathered part of shale deposited in a shallow marine environment and subjected to diagenesis.
Other localities
- Hagidaira Mine (Bedded Mn, Noble Opal)
- Hosaka (Rhyolite, Nodule)
- Sukayu hot spring (Hot spring, Massive)
- Opal Quest Mine (Shale, replacing Bivalvia)
- Old Timers Mine (Shale, replacing Bivalvia)