20.09ct Quilpie Boulder Opal Stone | #17

Australian Boulder Opal:, Weight (carats), 20.09ct, Dimensions (millimeters), 21.67mm x 16.55mm x 7.43mm, Origin, Quilpie Mining District, Queensland,

Purple Pear Shaped Australian Boulder Opal

Bright Blue 11.41ct Quilpie Boulder Opal Stone

Loose cabochon opal

Australian Boulder Opal:, Weight (carats), 22.41cts, Dimensions (millimeters), 24.85mm x 16.44mm x 6.91mm, Origin, Quilpie Mining District,

22.41ct Quilpie Boulder Opal Stone | #18

Pear Shaped 22.41ct Quilpie Boulder Opal Stone

Australian Boulder Opal:, Weight (carats), 20.87cts, Dimensions (millimeters), 35.21mm x 14.48mm x 5.29mm, Origin, Quilpie Mining District,

20.87ct Quilpie Boulder Opal Stone | #2

Loose Oval Cabochon Cut Blue Boulder Opal

16.29ct Boulder Opal Oval Cabochon Cut

Art Deco Black Boulder Opal Diamond Bracelet c.1930's

Bright Blue 11.41ct Quilpie Boulder Opal Stone

Loose 3.10ct Purple Quilpie Boulder Opal Stone