Opal in rhyolite matrix
Opal with play of colors, embedded in its rhyolite cantera matrix
Oxides
Rhodochrosite on Ilvaite
Botryoidal aggregates of rhodochrosite over ilvaite matrix.
Opal with play of colors, embedded in its rhyolite cantera matrix
Botryoidal aggregates of rhodochrosite over ilvaite matrix.