Dazzling Natural Dark Opal (B1 grading) from Lightning Ridge Australia

Gemstone Type: Natural Australian Dark Opal.
Origin: Lightning Ridge, NSW, Australia
Cut: Free-form Cabochon.
Colour: As shown; red, orange, blue, yellow, etc.
Weight: 0.65 Carats
Dimensions: Approx 7mm x 6mm x 2mm
Body Tone: 7N (Classified as Dark-Opal rather than Black-Opal)(Stones with a body tone of N5 to N9 are considered SEMI BLACK OPAL)
Brightness: B1
Treatments: None (No Enhancement)
Product text:
An excellent gemstone showing a combination of broad-flash and block-pattern. Classified as B1 on the Opal brightness chart (which goes from the brightest B1, to B7). Very, very nice rock.