Natural Lightning Ridge Solid Opal Sterling Silver Ring

Opal Type : Australian Solid Dark OpalCarat Weight : 2.52 ctSize : 11.00 mm x 12.30 mm approx.Color : Green BlueShape : OvalCut : Low Dome CabochonClarity : OpaqueBrightness B1 - B5 : B3.5B1:Faint  B2:Dull  B3:Bright  B4:Very  Bright  B5:BrilliantBody Tone N1-N9 : N5 Dark OpalN1-N4:Black Opal  N5-N6:Dark Opal  N7-N9:Light OpalTreatment : NONEOrigin : Lightning Ridge Opal Field, NSW Australia ---------------------------------------------------Total Item Weight : 4.63 gMetal Type : SilverMetal Purity : 92.5 Sterling Ring Size :US 8 (18.1 mm)Britain/Australia P1/2Asia 16Euro 56.5