23.15 Ct. Black Opal from Australia

One beautiful opaque 23.15 carat freeform Black Opal measuring 21.96 by 15.91 by 7.12 mm, offers a striking multi color display with intense color intensity and an excellent polish. This Australian gem presents broad, linear play of color that alternates electric blues and vivid greens across a dark base, qualities that typify high grade black opal material. The freeform shape maximizes the visible color bearing surface, and the opaque body tone enhances contrast and depth, producing dramatic color flashes even under modest light. Cut not applicable for this specimen, enhancement no enhancement, and the polish is excellent, leaving the surface smooth and reflective while preserving natural character and minor matrix inclusions that confirm its natural origin.

For an educated buyer, clarity and grading of opal are distinct from transparent gems, because evaluation emphasizes body tone, pattern, brightness, and the stability of the play of color. This piece scores highly for brightness with intense color intensity, a desirable pattern of broad stripes, and a dark body tone consistent with Australian black opal provenance. Black opals from Lightning Ridge form where silica rich solutions percolated into sandstone cavities, solidifying as closely packed silica spheres that diffract light to create the play of color. The broad stripe pattern and sustained brightness on this stone suggest a relatively thick precious opal layer rather than a thin seam, improving its durability and making it more suitable for secure settings. The 23.15 carat weight and substantial dimensions make it a rare collector quality stone, suitable for bespoke jewelry or an investment collection, where its natural, untreated status enhances long term value. Compared to white and crystal opal types, black opal consistently commands a premium in the market, and this untreated specimen, at 23.15 carat, represents a significant rarity for collectors and high end jewelers. Care recommendations include avoiding sudden temperature changes and prolonged exposure to strong solvents, and setting designs that protect the thinner edges while showcasing the color face. The Natural Gemstone Company stands behind the origin and untreated nature of this opal, offering documentation of Australian source and a straightforward guarantee of authenticity, making this example an excellent choice for connoisseurs seeking a museum quality black opal with proven origin and exceptional visual impact, our team can also provide additional imagery and independent appraisal upon request.