50 pieces, 618.10 carats, (Av.:12.36 cts)
3-6mm Thick, Flat back, Grid:38mmH x 28mmW
50 Pieces Boulder Matrix
50 Pieces, 745.75 carats (Av.: 14.91cts)
Size: 25x12 to 34x19
Thickness: 3mm - 6mm (Mostly 4 - 5mm)
Grid Sizes on photo: 38mmH x 28mmW
52005.0 - 50 Pieces Boulder Matrix
The smallest piece in this lot: 6 D
9 Piece set of Australian Boulder Opal
71.95 carats, 17x18mm to 22x18mm
Cut into “Shark Teeth” shapes,
Highly polished on both side with Opal.
52003.0 - Boulder Opal "Shark Teeth"
74.41 carats, 17x18mm to 20x19mm
Cut into “Shark Teeth” shapes
Highly polished on both sides.
52004.0 - Boulder Opal "Shark Teeth"
40 Pieces, 936.30 carats (Av.: 23.40cts)
Size: 28x14mm to 34x26mm
Thickness: 4mm to 8mm (Mostly 5-6mm)
All with a flat back.
Grid Sizes on Photo: 38mmH x 34mmW
40 Pieces - Boulder Opal
Free Cut Polished Faces
One firm tap on the thin blue seam of Opal in this somewhat less attractive looking stone and it split into two pieces.
Opal is like ordinary glass, so it broke nicely along the seam. (Photos taken afterwards)
But unlike glass, there was nothing ordinary about Nature’s handiwork exposed...
It is hard to believe that this multitude of colours were hidden inside this even less than ordinary looking cut stone, camouflaged by a thin strip of just plain blue Opal.
And; it is quite magical how the thin sliver of Opal on each half is able to generate such a variety of colours by just a few slight movements.
But then again; that’s the Magic of OPAL… Australian Boulder Opal, to be precise…!!!
40 Pieces Boulder Opal Matrix Weight: 390.84 Carats, (Av.: 9.77 Cts each)
Size: 18x14 to 25x17mm
Thickness: 3 - 6mm
Cut Rem.: Flat back
Grid Size: 38mmH x 34mmW.
246 pieces, 512.22 carats, (Av.: 2.08 cts)
Mixed sizes, includes off-cuts, tumbled.
Australian Boulder Opal Matrix.
Although not much Opal, the overall appearance is quite interesting.
Looks great in Silver Jewellery.
Grid Sizes on the photo: 27mm x 27mm
361.98 Carats (Average : 5.17 cts)
Size range (mm): 9x7 to 18x12
70 Boulder Matrix Cabochons
Thickness: 3mm - 7mm (Mostly 5mm+-)
Cut Rem: Flat backs.
Grid Sizes on the Photo: 38mm x 34mm
519.72 carats (Average: 12.99 cts)
Size Range (mm): 18x14 to 25x18
40 Boulder Opal Polished Faces
104 Pieces, 431.40 carats, (Av.: 4.15 cts)
Sizes: 9x8 - 22x17mm, Grid: 24mmH x 21mmW
70 Pieces, 267.92 carats, (Av.:3.83 cts.)
Size: 12x8 - 20x14mm, Thickness: 2 - 5mm
AUSTRALIAN BOULDER OPAL
Prices quoted are export prices in US$. For within Australia; Please contact us.
An approximate size of each stone can be estimated by the grid size of the section which each stone is inside. Grid sizes vary, lot to lot.
Our Boulder Opal are left natural, as created by Nature. Any crack or porosity in the rock has not been filled with resin or other compound.