Solid Lightning Ridge Black Opal Ring with Green Blue Colors Size US 6.75 7B1:Faint B2 :Dull B3:Bright B4:Very

7B1:Faint    B2 :Dull    B3:Bright    B4:Very Bright    B5:BrilliantBody Tone N1-N9 : N4 Black OpalN1-N4:Black Opal    N5-N6:Dark Opal    N7-N9:Light OpalTreatment : NONEOrigin : Lightning Ridge Opal Field

Britain/Australia M

B1:Faint  B2:Dull  B3:Bright  B4:Very  Bright  B5:Brilliant

Australian Solid Crystal Opal 10k Gold Ring

Solid Lightning Ridge Black Opal Ring with Green Blue Colors Size US 6.75 7B1:Faint B2 :Dull B3:Bright B4:VeryOpal Type : Solid Australian Black OpalCarat Weight : 1. 09 ctSize : 7. 31 mm x 10. 82 mm approxColor : Green Blue Shape : Free ShapeCut : Low Dome Cabochon Clarity : OpaqueBrightness B1 B5 : B3. 4B1: Faint B2: Dull B3: Bright B4: Very Bright B5: BrilliantBody Tone N1 N9 : N2 Black OpalN1 N4: Black Opal N5 N6: Dark Opal N7 N9: Light OpalTreatment : NONEOrigin : Lightning Ridge Opal Field, NSW Australia Total Item Weight : 5. 54 gMetal Type :