Natural Solid Lightning Ridge Black Opal Ring with Green Blue Colors Opal Rings 6B1:Faint B2:Dull B3:Bright B4:Very Bright

6B1:Faint    B2:Dull    B3:Bright    B4:Very Bright    B5:BrilliantBody Tone N1-N9 : N7 Light OpalN1-N4:Black Opal    N5-N6:Dark Opal    N7-N9:Light OpalTreatment : NONE

57 gramsMetal Type : SilverMetal Purity : 92

N1-N4:Black Opal    N5-N6:Dark Opal    N7-N9:Light Opal

9B1:Faint B2:Dull B3:Bright B4:Very Bright B5:BrilliantBody Tone N1-N9 : N6 Dark OpalN1-N4:Black Opal N5-N6:Dark Opal N7-N9:Light OpalTreatment : NONEOrigin : Lightning Ridge Opal Field

Natural Solid Lightning Ridge Black Opal Ring with Green Blue Colors Opal Rings 6B1:Faint B2:Dull B3:Bright B4:Very BrightAustralian Solid Natural Black Opal 10k Gold Ring. Opal Type : Australian Solid Black OpalCarat Weight : 0. 85 ctSize : 6. 34 mm x 7. 12 mm approxColor : Green BlueShape : PeachCut : Medium High Dome CabochonClarity : TranslucentBrightness B1 B5 : B3. 6B1: Faint B2: Dull B3: Bright B4: Very Bright B5: BrilliantBody Tone N1 N9 : N3 Black OpalN1 N4: Black Opal N5 N6: Dark Opal N7 N9: Light OpalTreatment : NONEOrigin : Lightning Ridge Opal Field, NSW