Ring with trillion-cut violet-blue stone and clear melee stones

This ring features a central trillion-cut (triangular) faceted stone with a vibrant violet-blue hue, held in a three-prong setting. The owner identifies the central stone as tanzanite and the accents as diamonds, though this remains unverified without professional gemological testing as synthetic or glass stimulants can mimic this appearance. The band appears to be constructed of a yellow-toned metal, possibly gold, though no hallmarks or purity stamps are visible in the image to attest to its composition. The shank is ornately decorated with three rows of small, round clear stones; the top and bottom rows appear to be bead-set or pave-set, while the central row features slightly larger stones in what appears to be a channel or common-prong arrangement. The overall design is consistent with late 20th-century or contemporary fine jewelry styles. The metal shows some minor surface scratching consistent with light wear. The central stone exhibits good saturation and pleochroism characteristic of tanzanite-style materials, but physical inspection by a certified gemologist is required to determine the specific mineral species and origin.

I have examined the image provided and cannot verify the specific materials or hallmarks from a photograph alone. Based on the owner's identification of the central stone as a tanzanite and the accents as diamonds set in yellow gold, I have provided an estimate reflecting those materials as a working hypothesis. The central stone appears to be a trillion-cut violet-blue gemstone with saturation consistent with mid-to-high quality tanzanite; however, I cannot verify if this is a natural mineral or a synthetic stimulant without a physical refractive index and pleochroism test. The clear stones on the shank are bead-set and channel-set, a design consistent with contemporary fine jewelry, but their identity as diamonds is unverified. This estimate assumes the metal is 14k or 18k gold and the stones are natural. The value is driven by the size and color saturation of the central stone and the total carat weight of the melee diamonds. Market demand for tanzanite remains steady, as it is a single-source gemstone, though pricing is highly sensitive to color depth. My appraisal value assumes the materials are as claimed; if this ring is determined through gemological testing to be silver with cubic zirconia or glass stimulants, the value would likely fall to $50 - $150. To confirm these values, a physical inspection by a certified gemologist is required to test for chemical composition, stone density, and to locate any internal hallmarks or purity stamps that are not visible in the provided image.