Solid Australian Lightning Ridge Opal Sterling Silver Ring

Opal Type : Solid Australian Dark OpalCarat Weight : 1.65 ctSize : 7.50 mm x 8.73 mm approx.Color : Green BlueShape : OvalCut : Low Dome Cabochon Clarity : TranslucentBrightness 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 Opal Treatment : No EnhancedOrigin : Lightning Ridge  Opal Field, NSW Australia. ---------------------------------------------------Total Item Weight : 6.14 gMetal Type : SilverMetal Purity : 92.5 Sterling Ring Size :US 6.5 (16.9 mm)Britain/Australia M1/2Asia 13Euro 52.5