| ...and from the Queensland opal fields you get: | |
| 1. | a cut boulder opal with a lustrous play of colour |
| 2. | a boulder rough opal |
| These are typical examples of cut and rough Boulder Opals for this special offer: | |
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| Boulder Opal is the variety found in Queensland and has an ironstone host rock forming naturally as part of the gem. They are solid opals. Boulder Matrix-Opal is ironstone containing veins of precious opal. Boulder-Opal has also a brown ironstone covered with precious opal. Boulder Opal forms in thin veins throughout the ironstone boulder and is cut with the hostrock. Yowah-Nut-Opal has a nut like appearance. Opal occurs in kernels inside an ironstone. These are mined at Yowah in Queensland. |
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