4.37 Ct. Multi Color Black Opal (Dark Opal) from Australia

One natural Black Opal, also described as a Dark Opal, weighing 4.37 carats, oval shape, with dimensions 15.67 x 10.75 x 3.77 millimeters, offers a substantive presence for bespoke jewelry. The faceting style is Tablet, producing a broad, flattened profile that emphasizes color play across the surface. The specimen is opaque with vivid color intensity and an excellent polish, and it is unenhanced. Origin is Australia, which is consistent with the darker body tone that serves to heighten play-of-color. Visually the stone displays multicolor play dominated by deep blue and green flashes with intermittent aqua and indigo areas. The color patches are broad and coherent rather than highly pinstone, and the dark body tone affords strong contrast, making the color appear saturated under indoor and natural light.

From a gemological and practical standpoint the tablet cut and the 3.77 millimeter thickness merit consideration when planning a setting. Tablet cuts are relatively shallow compared with cabochon domes, and they present color across a wide, flattened table. This geometry is advantageous for display in low-profile applications such as pendants and cabochon style rings that sit close to the finger. Opal mineral hardness is lower than many faceted gems, and the material can exhibit natural internal structures such as thin color banding or minor matrix remnants. Because this opal is untreated, it retains its natural stability profile and will respond to handling and environmental conditions in the same manner as other natural black opals.

When integrating this black opal into a custom design, consider complementary stones and metals that either reinforce the dominant color or provide contrast. White diamonds are a traditional and effective choice for accent stones, providing brilliance and a neutral counterpoint that lifts the blue green play-of-color. Use of small melee diamonds in a halo or as flanking stones will add resilience and sparkle without competing with the opal. For tonal harmony, deep blue sapphires will emphasize indigo and navy flashes, while bright green gemstones such as tsavorite garnet or finely cut emerald accents will pick up and amplify green flashes within the opal. For a modern or dramatic presentation, a darkened metal finish or black rhodium plating on a white gold mount increases perceived depth of tone and creates a striking negative space against which the opal’s colors register more vividly. As the tablet cut sits relatively flat, bezel settings or low profile prong systems are recommended to protect edge wear and to maintain a secure, practical mount.

Care and mounting guidance are important to preserve the appearance and longevity of the stone. Avoid ultrasonic and steam cleaning, and do not expose the opal to sudden temperature changes or harsh household chemicals. Routine cleaning with a soft cloth and mild soapy water, followed by gentle drying, is appropriate. Protective settings such as full or partial bezels, thin protective rims, or recessed gallery work well for tablet cuts and reduce the risk of edge chipping during everyday wear. The Natural Gemstone Company can provide additional detailed images, measurements, and matching accent stones to support bespoke design work, and can offer guidance on specific setting types, metal choices, and stone pairings suited to the tablet geometry. This Black Opal is presented as a natural, unenhanced specimen suitable to serve as a focal element in considered, high quality custom jewelry.