Choose your favorite unset cut and polished Australian boulder matrix opal from our collection below:

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
14 x 14 mm x 7 mm thick
Weight: 10.4 carats
Bright multicolored matrix ring stone

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
27.7 mm x 11.3 mm x 10 mm thick
Weight: 32.20 carats
Green sparkles of colours

   

Solid Australian natural boulder matrix opal, cut and polished cabochon
from Opalton, Queensland
29.7 x 23 mm x 8.5 mm thick
Weight: 56 carats
Matrix opal with various bright colours including red

     

Australian natural boulder opal matrix, cut and polished, ready to be set
from Opalton, Queensland
30 x 21 mm x 7 mm thick
Weight: 36.3 carats
Bright colours with some red flashes

       

Big Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
39.7 x 23.5 mm x from 2 to 7.5 mm thick
Weight: 45.55 carats
Bright multicoloured matrix opal with red

     

Big Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
43 x 27.5 mm x 8 mm thick
Weight: 78.2 carats
Matrix opal with various small colours.

     

Big Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
43 x 26 mm x 9 mm thick
Weight: 100 carats
Matrix opal with reduced price because of 1 minute small surface crack
(not affecting solidity or stability).
Various bright green colours including red.

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
21 mm x 14 mm x 5.5 mm thick
Weight: 15.52 carats
Green matrix opal

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
27.7 x 15 mm x 7 mm thick
Weight: 26 carats
Bright multicolored matrix opal with red

     

Unset cut Australian natural boulder matrix opal
from Winton, Queensland
30.5 x 17 mm x 6 mm thick
Weight: 28.5 carats
Bright multicolored matrix opal with some red

     

Unset cut Australian natural boulder matrix opal cabochon
from Opalton, Queensland
22 x 15 mm x 7.6 mm thick
Weight: 24.8 carats
Bright blue and green matrix opal

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
32 x 20.6 mm x 5.4 mm thick
Weight: 31.4 carats
Bright blue and green matrix opal

     

Unset cut Australian natural boulder matrix opal
from Winton, Queensland
24.5 x 27 mm x 6 mm thick
Weight: 33 carats
Bright multicolored matrix opal with some red

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
25 x 16 mm x 5 mm thick
Weight: 16.6 carats
Various bright colurs

     

Big Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
39 x 32 mm x 9 mm thick
Weight: 99.4 carats
Boulder matrix opal with various colours

     

Unset cut Australian natural boulder matrix opal
from Winton, Queensland
44 x 22.7 mm x 9.5 mm thick
Weight: 78 carats
Opal matrix with veins of various bright colours

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
27.6 mm x 18 mm x 7.3 mm thick
Weight: 36.10 carats
Multicolored matrix opal with red

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
28 mm x 19.6 mm x 6.4 mm thick
Weight: 29.67 carats
Full of green sparkles of colours

     

Big Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
33 x 27.7 mm x 10.6 mm thick
Weight: 74.25 carats
Bright green sparkles of colours on both sides

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
31 mm x 16 mm of max. width x 6 mm thick
Weight: 28.67 carats
Bright green matrix opal with with red

     

Big Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
31 x 30 mm x 7.5 mm thick
Weight: 67.48 carats
various colours with bright red on both sides

     

Unset cut Australian natural boulder matrix opal
from Winton, Queensland
30 mm wide x 22 mm high x 5.6 mm thick
Weight: 25 carats
Reversible opal matrix with various bright colours on both faces

     

Very big Unset cut Australian natural boulder matrix opal
from Winton, Queensland
57.2 x 36 x 6.3 mm thick
Weight: 147.8 carats
Big opal matrix with sparkles of bright green and red colours

     

Unset cut Australian natural boulder matrix opal
from Winton, Queensland
31 x 30.5 mm x 6 mm thick
Weight: 69.5 carats
Opal matrix with veins of various bright colours

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland
23 mm x 11.5 mm x 5.5 mm thick
Weight: 10.95 carats
Bright blue and green matrix

     

Unset cut Australian natural boulder matrix opal
from Winton, Queensland
36 x 24 mm x 5 mm thick
Weight: 35.5 carats
Bright multicolored matrix opal with red

     

Big Unset cut Australian natural boulder matrix opal
from Winton, Queensland
41 x 25 mm x 7.5 mm thick
Weight: 83 carats
Free form opal matrix with mostly bright green sparkles of colour

     

Unset cut Australian natural boulder matrix opal
from Opalton, Queensland, Australia
30 mm x 12 mm x 6 mm thick
Weight: 17.20 carats
Bright multicolored matrix opal

     

Big unset cut Australian natural boulder matrix opal
from Winton, Queensland
37 x 28 mm high x 6.6 mm thick
Weight: 50.69 carats
Bright multicolored matrix opal with red