Lightning Ridge Solid Natural Polished Black Crystal Opal.
Opal Type : Solid Australian Black Crystal Opal
Carat Weight : 2.60 ct
Size : 9.82 mm x 12.56 mm approx
Thickness : 4.08 mm
Color : Blue
Shape : Free Shape
Cut : Medium Dome Cabochon
Clarity : Translucent
Brightness B1 - B5 : B3.5
B1:Faint B2:Dull B3:Bright B4:Very Bright B5:Brilliant
Body Tone N1-N9 : N3 Black Opal
N1-N4:Black Opal N5-N6:Dark Opal N7-N9:Light Opal
Treatment : NONE
Origin : Lightning Ridge Opal Field, NSW Australia.