Boulder Opal Mining at The Arch Mine
Mining boulder opal at the Arch mine - aerial view
Mining Boulder Opal
Mining Boulder Opal at the Gorge
Rehabilitation of Boulder Opal Mine Sites
Restoring and rehabilitating boulder opal mine sites
Boulder Opal Mining - Cutting Down Mountains
A mesa mined for boulder opal
Opal level
The opal level showing a malformed boulder in the sandstone above the bottom level which is 'working' nicely.
Mining for Opal - Boulder Opal in the Floor
The first signs of boulder opal
Boulder Opal in Floor
Earthmoving equipment scrapes over and breaks the top off an opal bearing boulder
Shincracker
A 30 tonne excavator makes light work of digging out massive pieces of shincracker (silcrete).
