These boulder opals were cut for a necklace. Photo by Robert Weldon/GIA.
Boulder opal can display incredible colors. Photo courtesy Cody Opal.
Opal artist Eddie Maguire turns boulder opal into pieces of art. Photo by Andrew Lucas/GIA.
This boulder opal specimen was polished to bring out its beauty. Photo by Andrew Lucas/GIA.
Opal miners call this structure of boulder opal bubbles. Photo by Andrew Lucas/GIA.
Maguire blends elements from many cultures to create his boulder opal works of art. Photo by Andrew Lucas/GIA.
Raleigh Henderson uses divining rods to search for signs of boulder opal at his mine in the Yowah area. Photo by Andrew Lucas/GIA.
Boulder opal is concentrated toward the core of this nut. The specimen was polished for collectors. Photo by Andrew Lucas/GIA.
This black opal shows some very bright colors in its pattern. Photo courtesy Cody Opal.
This opal miner near Yowah almost looks like he would have fit right in during the settlement period of the western United States. Photo by Andrew Lucas/GIA.
Moore takes a moment to enjoy life in his home in the outback. Photo by Tao Hsu/GIA.
Boulder opal miner Mark Moore displays one of the boulder opals showing seams of color in the dark ironstone matrix he cut from his mine’s production at Koroit. Photo by Andrew Lucas/GIA.
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