Boulder opal 4.01ct 10.8 x 13mm Australian opal natural solid loose unset stone

DETAILS: No9128 Natural solid boulder opal loose stone 4.01ct
Stone Natural solid boulder opal
Carat 4.01ct
Dimensions 10.80mm x 13.43mm Thickness 2.97mm (at the longest point)
Shape Freeform
Colour Grey-blue green
Transparency Opaque
Origin Winton, Queensland, Australia
Note: *It has a slight undulating surface but smooth polish.
Last picture is back of the stone.
All photos were taken under natural light, sunlight and LED lights.

*Please check the measurements before purchase, the items appear bigger in photos.