Freeform Australian Black Opal Cabochon Appraisal

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Freeform Australian Black Opal Cabochon

This item is a loose, natural black opal gemstone, likely of Australian origin (notably Lightning Ridge), presented in a black jeweler's display gemstone box with a white satin-lined interior. The gemstone is cut in a freeform, asymmetrical kite-like cabochon shape. It exhibits a dark body tone with vibrant play-of-color, predominantly featuring shifting flashes of electric green and deep cobalt blue. The color pattern appears to be a broad flash or rolling flash, which is highly desirable in fine opals. The surface appears to be highly polished with a smooth, glass-like finish, though minor surface micro-scratches consistent with handling or being an older cut may be present upon microscopic inspection. The edges are well-defined but rounded for setting. There are no visible signs of 'crazing' (fine surface cracks), which is a critical indicator of structural stability and quality in opals. The stone is opaque with deep saturation, indicating a high-quality N1 to N3 body tone classification. The craftsmanship of the cut follows the natural vein of the precious opal, maximizing the color face while maintaining a unique geometric profile. The presentation box suggests it is a contemporary piece or a professionally traded loose stone ready for jewelry mounting.

Estimated Value

$4,500 - $6,200

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