Queensland, Australia A boulder opal specimen, impressive in size, displays a thick ivory-toned opaque portion of opal, with some pink and green flash, atop a chocolate colored body with delicate amber-toned swirls. Boulder opal is found in Australia where precious opal forms in veins within brown ironstone boulders. The very large band of opal was exposed when a portion of the nodule in which it was formed weathered and fell away. Measures 5 ¼ x 3 x 2in
Queensland, Australia A boulder opal specimen, impressive in size, displays a thick ivory-toned opaque portion of opal, with some pink and green flash, atop a chocolate colored body with delicate amber-toned swirls. Boulder opal is found in Australia where precious opal forms in veins within brown ironstone boulders. The very large band of opal was exposed when a portion of the nodule in which it was formed weathered and fell away. Measures 5 ¼ x 3 x 2in
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
