Pair of Round Cut Black Gemstone Stud Earrings

This item consists of a pair of stud earrings featuring round brilliant-cut black gemstones, likely black diamonds, spinels, or onyx, estimated at approximately 1.0 to 1.5 carats each based on their scale relative to the fingertips. The stones are secured in four-prong basket settings made of a white-colored metal, such as sterling silver, white gold, or platinum. The metal displays a bright, polished finish with no immediate signs of heavy oxidation or tarnish, suggesting high-quality plating or a noble metal composition. The gemstones exhibit a high luster and sharp facet edges, with one stone reflecting a distinct blue light, which could indicate a specific treatment, a coating, or the reflection of nearby ambient light. Physically, the studs appear to be contemporary in style, characterized by a minimalist aesthetic that emphasizes the stones over the metalwork. The earrings are held between fingers against a white fluted plate/surface, showing their small, portable scale. No structural damage is visible; the prongs appear symmetrical and intact, firmly gripping the girdles of the stones. There are no visible maker's marks or hallmarks in this view, though they would typically be found on the earring posts or friction backs. The overall craftsmanship appears consistent with modern commercial jewelry production.

I have virtually examined this pair of round-cut black gemstone stud earrings. The items feature two round brilliant-cut stones, approximately 1.0 to 1.5 carats each, set in four-prong white metal basket settings. The stones exhibit high luster and sharp faceting, consistent with treated black diamonds or high-quality synthetic spinels. The metal reflects light in a manner consistent with rhodium-plated sterling silver or 14k white gold. Structurally, the earrings are in excellent contemporary condition with symmetrical prongs. The valuation is centered on the current 'affordable luxury' market. If the stones are confirmed as natural black diamonds set in 14k white gold, the value would trend toward the $450 high end. If confirmed as black spinel or onyx in sterling silver, the value resides at the $150 low end. The 'blue flash' noted on one facet suggests a potential refractive anomaly or high-polish reflection often seen in lab-grown or treated variants. Limitations: This appraisal is based solely on visual inspection of the digital image. I cannot definitively verify the metal purity without a professional acid test or XRF analysis, nor can I distinguish between natural black diamonds and lab-created simulants (like Moissanite) without a thermal conductivity probe and spectroscopic analysis. A full authentication would require inspecting the posts for hallmarks (e.g., '585' or '925') and using a jeweler's loupe to identify surface-reaching inclusions or pits typical of natural carbon. Provenance or a GIA grading report would significantly solidify and potentially increase the valuation.