Black Opal Value Appraisal

Parcel of Loose Black or Dark Opal Cabochons

This parcel consists of five oval-shaped loose gemstone cabochons, identified as opals, likely of the black or dark variety based on the body tone. The gemstones exhibit vibrant play-of-color, including neon greens, electric blues, and flashes of orange and red against a dark base. Each stone is cut into a symmetrical oval cabochon with a polished dome. The sizes appear to be relatively uniform, likely ranging between 8mm to 12mm in length, though an exact measurement would require a micrometer. The craftsmanship displays a standard commercial to fine-grade polish, intended for use in jewelry settings such as rings or pendants. One stone is shown from the reverse, revealing a dark, opaque potch or backing, which is characteristic of natural solid black opals or potentially doublet constructions; however, the lack of a visible join line suggests they are solid stones. There are no immediate signs of cracking (crazing) visible through the plastic packaging, though the surface should be inspected for micro-scratches. The vibrant saturation of the green and blue flashes indicates high-quality silica structure. Given the coloration and opal type, these stones are stylistically consistent with Australian material from Lightning Ridge, potentially dating from the late 20th century to the present day.