Four-Piece Jewelry Assortment Featuring Onyx and Amethyst

This jewelry assortment consists of four distinct pieces: a pendant necklace, a pair of stud earrings, and a loose teardrop pendant. The primary necklace features a large, rectangular emerald-cut black onyx stone set in a yellow gold-toned basket setting, suspended from a delicate Singapore-style chain. The matching stud earrings appear to feature circular, faceted black stones, likely onyx or spinel, held by four-prong settings with standard butterfly friction backs. Additionally, there is a small, loose pear-cut purple gemstone, likely amethyst, set in a minimalist yellow metal pendant mount. The metal appears to be at least 10k or 14k yellow gold based on the luster and color, though specific hallmarks are not visible in the provided image. The pieces reflect a classic, contemporary aesthetic typical of the late 20th century. The condition appears fair to good with minor surface scratches on the metal and stones consistent with gentle wear. The chain shows no visible kinks or breaks, and the settings appear structurally sound. The deep black hue of the primary set provides a sharp contrast against the gold-toned metal, suggesting a formal or semi-formal design intent.

Based on my visual examination of this jewelry assortment, I identify a collection typical of commercial-grade fine jewelry from the late 20th to early 21st century. The centerpiece is the rectangular emerald-cut pendant, which displays the opaque, glassy luster characteristic of black onyx. While the mounting exhibits the warm hue of 10k or 14k yellow gold, the lack of visible hallmarks in the photographs necessitates a conservative assumption. If the metal is merely gold-filled or plated, the value would be significantly lower; however, the Singapore chain style is often associated with solid gold, suggesting a likely 10k composition. The accompanying stud earrings appear to be a coordinating set, likely onyx or glass, set in standard four-prong basket mountings. The loose pear-cut amethyst pendant shows decent saturation, though its small carat weight limits its individual market impact. The current secondary market for such items is moderate. Black onyx had a peak in popularity during the 1980s and 90s, and while it remains a staple, it does not command high premiums today. Buyers for these lots are typically looking for wearable estate pieces or scrap gold value. The condition appears to be 'good' with standard wear, but without physical testing, I cannot rule out that the 'stones' are synthetic or glass simulants. To provide a definitive valuation, I would require an in-person inspection to perform an acid test or XRF analysis on the metal to confirm gold purity (10k vs 14k vs plated). Additionally, refractive index testing is needed to confirm the stones are genuine onyx and amethyst rather than dyed chalcedony or glass. The estimated value assumes 10k-14k gold settings and genuine semi-precious gemstones.