Natural Lightning Ridge Solid Opal Sterling Silver Ring

Opal Type : Solid Australian Dark OpalCarat Weight : 1.32 ctSize : 6.50 mm x 11.43 mm approxThickness : 3.54 mmColor : Green Yellow Orange BlueShape : PearCut : Low Dome Cabochon Clarity : TranslucentBrightness B1 - B5 : B3.7B1: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 : 4.84 gMetal Type : SilverMetal Purity : 92.5 Sterling Silver Ring Size :US-6.5 (16.9 mm)Britain/Australia M1/2Asia 13Euro 52.5