Opal Type : Solid Australian Black Opal
Carat Weight : 1.70 ct
Size : 6.65 mm x 8.30 mm approx.
Color : Blue
Shape : Oval
Cut : Facet
Clarity : Opaque
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.