LIGHTNING RIDGE AUSTRALIA HOME OF THE BLACK OPAL! Ninety percent of opal is mined in Australia! Opal Street in Lightning Ridge. Rare fossilized & Opalized Clam...millions of years old. Sixty feet down,looking up from the bottom of opal mine. Father & son opal miners,hard hats required! Very Rare Opal "Pineapple" Psudomorph - 1,395 cts!