Boulder Opal is a type of unique rock found in Queensland, Australia. It is easily identifiable because it is a mixture of ironstone and opal either in a matrix or layered; the stones often have a more ‘Earthy’, ‘rocky’ look and feel about them. Read More

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          Showing 1–36 of 273 results

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          125.7 Carats Unicorn Horn Winton Boulder Opal

          $4,999.00 $3,749.25

          Best Of Yowah Split Boulder Opal

          $3,990.00 $2,992.50

          214.9 Carat Large Double Sided Wood Fossil Boulder Opal Specimen

          $3,500.00 $2,625.00

          Stunning Purple 3D Effect Winton Boulder Opal

          $2,950.00 $2,212.50

          Amazing Brilliant Electric Flash Large Boulder Opal

          $2,500.00 $1,875.00

          Stunning Double Sided Sky Blue Wood Fossil Koroit Boulder Opal

          $2,250.00 $1,687.50

          106.9 Carats Stunning Winton Boulder Opal

          $2,200.00 $1,650.00

          Supernatural Glowing Purple Winton Dark Ironstone Boulder Opal

          $2,000.00 $1,500.00

          Phenomenal Purple Winton Dark Ironstone Boulder Opal

          $1,850.00 $1,387.50

          Rainbow Winton Boulder Opal 33.35 ct

          $1,850.00 $1,387.50

          18.5 Carats Magnificent Color Play Winton Boulder Opal

          $1,800.00 $1,350.00

          141.20 Carat Large Wood Fossil Boulder Opal Specimen

          $1,750.00 $1,312.50

          Amazing Green and Blue Sparkling Dark Ironstone Boulder Opal 25.1 Carats

          $1,600.00 $1,200.00

          73.9 Carats Amazing Electric Reef Boulder Opal

          $1,600.00 $1,200.00

          Gorgeous Double Sided Yowah Nut

          $1,500.00 $1,125.00

          83.05 Carats Rare Split Boulder Opal Pair

          $1,450.00 $1,087.50

          Royal Purple Dark Ironstone Boulder Opal

          $1,300.00 $975.00

          286.30 Carat Massive Stunning Ocean Boulder Opal Specimen

          $1,200.00 $900.00

          145 Carat Amazing Large Boulder Opal Specimen

          $1,200.00 $900.00

          123.7 Carats Rare Wood Fossil Boulder Opal

          $1,200.00 $900.00

          120.55 Carats Rare Wood Fossil Boulder Opal

          $1,200.00 $900.00

          Stunning Forrest Green Wood Fossil Boulder Opal 12.5 ct

          $1,200.00 $900.00

          Rainbow Boulder Opal 4.9 ct

          $1,200.00 $900.00

          Stunning Boulder Opal Ringstone 6.85 ct

          $1,200.00 $900.00

          Purple Rain Stunning Winton Boulder Opal

          $1,150.00 $862.50

          Majestic Purple Glow Pendant Size Winton Boulder Opal

          $1,100.00 $825.00

          138.9 Carats Winton Matrix Pattern Boulder Opal

          $1,600.00 $1,000.00 USD

          21.1 Carats Beautiful Green Winton Boulder Opal

          $1,000.00 $750.00

          Gorgeous Colors Winton Boulder Opal

          $925.00 $693.75

          Very Colorful Winton Boulder Opal

          $900.00 $675.00

          Green Pendant Size Boulder Opal 54.55 Carats

          $900.00 $675.00

          Fascinating Rainbow Stripe Color-Bar Winton Boulder Opal

          $880.00 $660.00

          Double Sided Gem Yowah Nut Boulder Opal

          $825.00 $618.75

          113.85 Carats Wood Fossil Boulder Opal

          $825.00 $618.75

          Purple with Green Spec Dark Ironstone Winton Boulder Opal

          $800.00 $600.00

          Lovely Green and Blue Ocean Boulder Opal 36.9 Carats

          $800.00 $600.00