Solid Natural Black Opal from Lightning Ridge with Blue Green Colors. Crystal Opals 75 mm approx

75 mm approx

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

Opal Type : Solid Australian Dark Opal

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

Opal Type : Australian Solid Light Crystal Opal

Solid Natural Black Opal from Lightning Ridge with Blue Green Colors. Crystal Opals 75 mm approxSolid Polished Black Opal from Australia display Blue Green Color Fires. Opal Type : Solid Australian Black Opal Carat Weight : 3. 28 ct Size : 9. 74 mm x 13. 85 mm approx Thickness : 4. 23 mm Color : Blue Green Shape : Oval Cut : Medium Dome Cabochon Clarity : Translucent Brightness B1 B5 : B3. 6 B1: Faint B2: Dull B3: Bright B4: Very Bright B5: Brilliant Body Tone N1 N9 : N3 Black Opal N1 N4: Black Opal N5 N6: Dark Opal N7 N9: Light Opal Treatment :