Opal
Origin: Lightning Ridge, New South Wales, Australia
Ex. Marty Zinn collection
Sample size: 5.6 x 4.5 x 3.2 cm
Ex. Richard Hauck collection
Origin: Virgin Valley, Nevada, U.S.A.
Sample size: 4.3 x 3.5 x 3.1 cm (top), 5.7 x 3.6 x 2.5 cm (bottom)
Opalised clam
Origin: Coober Pedy, South Australia, Australia
Ex. Richard Hauck collection
Sample size: 4.5 x 3.8 x 2.0 cm
"Wood opal" variety of petrified wood
Origin: Haskovo, East Rhodopen Mts., Bulgaria
Sample size: 12.1 x 10.8 x 5.9 cm
Origin: Coober-Pedy, South Australia, Australia
Sample size: 11.0 x 7.2 x 4.8 cm
Black opalised tree limb
Origin: Virgin Valley, Humboldt Co., Nevada, U.S.A.
Ex. John Sinkanka and Richard Hauck collections
Sample size: 5.3 x 4.8 x 3.3 cm
Origin: Spencer, Clark Co., Idaho, U.S.A.
Ex. Don Belsher collection
Sample size: 5.7 x 4.5 x 4.7 cm
Origin: Fish Lake Valley, Mineral Co., Nevada, U.S.A.
Sample size: 4.5 x 3.2 x 1.9 cm
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