A rare expression of Blue and Green, quiet, controlled and infinitely deep. Key Specifications Origin: Lightning Ridge, NSW Variety: Natural Black Opal Type 1 Weight: 107.24 ct (21,45g) Dimensions: 57 mm length, 34.85 mm width, 7.52 mm height Cut: Cabochon Body Tone: Black N4 (8) Brightness: Bright Colour profile Colour: Blue-Green Pattern Type: Mixed Pattern Distribution: Over 80% Depth: Moderate depth with visible layering Movement: Gentle rolling movement. Calm oceanic feel. Collector's Guide This opal fits into the "premium blue green" category prized by collectors for its stability and consistent brightness. Key collector attributes present in this opal. Investment Notes: Blue-green Lightning Ridge opals remain the most stable in value. Supply of these continues to decline year on year. Mid-to-high tier investment piece with long-term desirability. Collector’s Insight: The internal structure shows broad flash with directional movement, which is one of the most emotionally engaging patterns for collectors. This opal has a window of colour effect-the colour appears to open and close as the opal tilts. This type of movement is often described as "alive in the hand". A Certified Asset Valuer has independently assessed this Opal. A certificate of authenticity will be supplied with the purchase. Free shipping within Australia.