Unset cut boulder matrix opal
31 x 17 x 7 mm thick
Weight: 27.30 carats
Green and red colours on both sides
(Reversible stone)
Origin: Winton, Queensland, Australia
Big unset cut boulder opal
23 x 14 x 6.4 mm thick
Weight: 17.5 carats
Various light colours
Origin: Winton, Queensland, Australia
Unset cut boulder opal
23 x 9.5 x 3.7 mm thick
Weight: 5.5 carats
Bright green colours with some red
Origin: Winton, Queensland, Australia
Big unset cut natural boulder matrix opal
44 x 33 x 8 mm thick
Weight: 132 carats
Bright green colours
Origin: Winton, Queensland, Australia
Suitable for a Western style belt buckle
Unset cut boulder opal
14 x 13 x 4.2 mm thick
Weight: 5.5 carats
Various colours with bright red
Origin: Winton, Queensland, Australia