Boulder opal 6.26ct 18 x 10mm Australian opal natural solid loose unset stone

DETAILS: No8901 Natural solid boulder opal loose stone
Stone Natural solid boulder opal
Carat 6.26ct 
Dimensions 18.67mm x 10.13mm Thickness 4.21mm (at the longest point)
Shape Freeform
Colour Green grey
Transparency Opaque
Origin Winton, Queensland, Australia
Note: 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.