Tanzanite and Diamond Ballerina-Style Halo Ring

This is a fine jewelry ring featuring a central oval-cut tanzanite gemstone, characterized by its distinct violet-blue saturation and high level of pleochroism. The tanzanite is securely held by four yellow gold prongs within a complex, multi-tiered white gold or platinum ballerina-style halo setting. This halo is comprised of two distinct diamond cuts: several round brilliant-cut diamonds are clustered at the top and bottom poles, while tapered baguette-cut diamonds are set in a radiating fan-like pattern along the lateral sides, creating a dynamic sense of movement and 'sunburst' sparkle. The band appears to be high-karat yellow gold, offering a classic mixed-metal aesthetic. The construction indicates a mid-to-late 20th-century design influence, specifically trending towards the late 1980s or 1990s. In terms of condition, the tanzanite shows good facet junctions with no visible major chips, though microscopic abrasions may be present consistent with wear. The baguette diamonds are channel-set to provide structural integrity. No visible manufacturer's hallmark is present in the image, but the precision of the prong work and the uniformity of the diamond melee suggest professional high-quality craftsmanship associated with commercial fine jewelry houses of that era.