Marquise-Shaped Black Gemstone and Marcasite Ring

This is an ornate ring featuring a prominent marquise-shaped face, likely crafted from sterling silver given its color and the presence of marcasite. The central design consists of multiple oval or marquise-cut black gemstones, possibly onyx, black spinel, or dark sapphire, set in individual bezels or prongs within a filigree framework. There appear to be approximately ten larger dark gemstones arranged in a clustered pattern. Surrounding these main stones and filling the negative space of the intricate metalwork are numerous small, faceted marcasite stones, providing a subtle, glittering effect. The marcasites exhibit a metallic luster characteristic of pyrite. The ring's overall aesthetic suggests a vintage or antique style, possibly Art Deco Revival or a late Victorian Gothic influence, typically dating from the late 20th century, though earlier periods are possible. The metal appears to have natural patination in the recessed areas, which enhances the detail of the filigree and the contrast with the polished surfaces and gemstones. No visible major damage like chips in stones or bent metal is apparent, but typical wear consistent with age, such as hairline scratches on the metal or minor abrasions on stone surfaces, could be present upon closer inspection. The craftsmanship appears to be respectable, with stones well-set and the filigree design evenly executed. No maker's marks or size details are visible in the provided image.