Rough Australian boulder matrix opals from our Queensland mine, in Australia,

3 sawn rough boulder opal matrix
from 27 x 22 mm to 53  x 27 mm
Total weight: 43 grams
Green colours

1 rough boulder opal matrix

sawn close to the colour
73 x 52 mm x 11 mm thick
Weight: 67 grams
Green and red colours

1 rough boulder opal matrix

sawn close to the colour
65 x 36 mm x 10 mm thick
Weight: 39 grams
Green and red colours

3 rough boulder opal matrix

sawn close to the colour
from 30 x 16 mm to 44 x 35 mm
Total weight: 47 grams
Green colours in every stone

2 rough boulder opal matrix
42 x 25 mm and 62 x 21 mm
Total weight: 60 grams
Green colours

2 rough boulder opal matrix
45 x 19 mm and 46  x 12 mm
Total weight: 27 grams
Green colours; one stone with red

7 rough boulder opal matrix

sawn close to the colour
from 16 x 13 mm to 29 x 23 mm
Total weight: 36 grams
Green colours; 2 stones with red

4 rough boulder opal matrix

sawn close to the colour
from 26 x 22 mm to 42 x 29 mm
Total weight: 52 grams
Green and red colours

4 rough boulder opal matrix

sawn close to the colour
from 18 x 18 mm to 53 x 29 mm
Total weight: 49 grams
Green colours in every stone

5 rough boulder opal matrix
from 30 x 23 mm to 39 x 38 mm
Total weight: 60 grams
I blue stone; 4 with green and red colours

5 rough boulder opal matrix

sawn close to the colour
from 22 x 19 mm to 52  x 40 mm
Total weight: 63 grams
Green colours

4 rough boulder opal matrix

sawn close to the colour
from 32 x 23 mm to 40 x 34 mm
Total weight: 62 grams
Green colours; 2 stones with red

2 rough boulder opal matrix

sawn through the colour
from 49 x 37 mm to 50 x 40 mm
Total weight: 66 grams
Green colours

5 rough boulder opal matrix

sawn close to the colour
from 30 x 19 mm to 39 x 36 mm
Total weight: 45 grams
3 stones with green colours;

2 stones with red

8 rough boulder opal matrix

sawn close to the colour
from 20 x 14 mm to 32 x 23 mm
Total weight: 58 grams
4 stones with green colours;

4 stones with red colours

6 rough boulder opal matrix

sawn close to the colour
from 19 x 15 mm to 30  x 26 mm
Total weight: 33 grams
3 stones with green colours

3 stones with red colours

1 rough boulder opal matrix slice

76 x 46 mm

x 7 to 12 mm thick

Weight: 54 grams
Mostly green colours

on both sides

4 rough boulder opal matrix

sawn through the colour
from 33 x 18 mm to 42 x 31 mm
Total weight: 54 grams
Green colours

Rough opal matrix split

Unusual matrix band

similar to jasper in appearance
58 x 44 mm and 49 x 33 mm
Total weight: 66 grams
Sparse traces of blue/green colours

Might be more under the part of the big piece which is not open

4 rough boulder opal matrix

from 27 x 26 mm to 40 x 28 mm
Total weight: 67 grams
Bright green colours

5 rough boulder opal matrix

sawn close to the colour

from 39 x 24 mm to 42 x 30 mm
Total weight: 71 grams
Bright green colours;

2 rough boulder opal matrix
39 x 31mm and 48 x 27 mm
Total weight: 76 grams
Green colours

Rough opal matrix sawn in 2 pieces
30 x 30 mm x 10 mm maximum thickness
Total weight: 25 grams
Mostly green colours

6 rough boulder opal matrix
from 19 x 15 mm to 43 x 27 mm
Total weight: 68 grams
Red colours in every stone

5 rough boulder opal matrix

sawn close to the colour
from 26 x 19 mm to 33 x 24 mm
Total weight: 44 grams
Red colours in every stone

4 rough boulder opal matrix
from 28 x 24 mm to 38 x 26 mm
Total weight: 74 grams

Green colours

7 rough boulder opal matrix
from 15 x 11 mm to 28 x 21 mm
Total weight: 33 grams

Green colours

4 rough opals
from 27 x 19 mm to 36 x 24 mm
Total weight: 60 grams

2 matrix stones with red,

one with green

and 1 boulder opal

with blue crystal opal in the center

2 rough boulder opal matrix
28 x 21 mm and 47 x 42 mm
Total weight: 53 grams
Mostly green colours

1 rough boulder opal matrix
75 x 54 mm x 14 mm of maximum thickness
Total weight: 66 grams
Lines of blue opal running right around the stone

Less than 1/3 of the top of the stone removed is

showing blue colours on picture

3 rough boulder opal matrix
from 25 x 24 mm to 32  x 27 mm
Total weight: 54 grams
Green colours

5 rough boulder opal matrix
from 24 x 17 mm to 45 x 24 mm
Total weight: 78 grams
Bright green colours

5 rough boulder opal matrix
from 20 x 18 mm to 31 x 24 mm
Total weight: 39 grams
Green colours

5 rough boulder opal matrix
from 17 x 16 mm to 42 x 34 mm
Total weight: 46 grams
Red colours in every stone

3 rough boulder opal matrix
from 32 x 22 mm to 46 x 37 mm
Total weight: 67 grams
Green colours

with one stone with red

Rough boulder opal matrix
52 x 41 mm x 17 mm thick
Total weight: 55 grams
Dark electric green colours

2 rough boulder opal matrix
45 x 21 mm and 51 x 30 mm
Total weight: 60 grams
Various colours with red

6 large

rough boulder opal matrix
from 45 x 30 mm to 70  x 40 mm
Total weight: 215 grams
Sparkles of varied colours with red
Light brown softer ironstone with an attactive pattern, but will undercut.
Best results is by varnishing (2 parts epoxy resin) after polishing

3 rough boulder opal matrix
3 x 25 x 25 mm
Total weight: 37 grams
2 stones with bright electric green
and one stone with bright red

Product Code: RM4
$60.00 USD

4 roughly faced boulder opal matrix
from 48 x 38 mm to 81 x 41 mm
Total weight: 130 grams
Varied colours

2 large rough boulder opal matrix
68 x 19 mm x 21 mm thick
and 87 x 32 mm x 27 mm thick
Total weight: 190 grams
Sparkles of various colours, including red

Very large Boulder opal matrix slice lightly sanded
113.55 x 77.17 x 9.13 mm thick
Weight: 125 grams.
Strong electric green and some blue flashes of colors

3 large rough boulder opal matrix slices
1/100 x 17 x 9 mm thick

2/ 99 x 18 x 6 mm thick
3/100 x 26 x 26 mm thick
Weight: 125 grams.
Sparkles of various colours, including red
The picture do not show the all
the colours properly

4 large rough boulder opal matrix slices
1/ 42 x 18 x 5 mm thick

2/ 56 x 19 x 6 mm thick

3/ 62 x 18 x 8 mm thick

4/ 66 x 16 x 8 mm thick
Weight: 70 grams.
Sparkles of various colours, including red
The picture do not show the
all the colours properly

Extra large slice of boulder opal matrix slightly sanded
143.73 x 86.80 x 8.53 mm thick
Weight: 211 grams.
Flashes of various dark colours,
The picture do not show the all the colours properly

Large rough boulder opal matrix slice (lightly sanded)
116.85 x 73.41 x 5.42 mm thick
Weight: 98 grams.
Strong electric green and some blue flashes of colours,
The picture do not show the all
the colours properly

3 large preformed rough boulder opal matrix
from 18 x 11 mm to 27 x 21.32 mm
Total weight: 13 grams(65 carats )
Bright dark colours with red

3 large preformed rough boulder opal matrix
from 33.5  x 33 mm

to 39 x 39.7 mm
Total weight: 73 grams

(365 carats )
Big stones with bright
sparkles of colours with red

4 large preformed rough boulder opal matrix
from 29 x 16.25 mm to 35.38 x 25.14 mm
Total weight: 30 grams
(150 carats )
Bright colours with lots of red

5 large preformed rough boulder opal matrix
from 23.9 x 19.7 mm

to 13.3 x 19.4 mm
Total weight: 44 grams
(220 carats )
Mostly electric green colours