Tiffany & Co. Black South Sea Pearl and Diamond Schlumberger-Style Pendant

This exquisite pendant features a large, spherical Black South Sea pearl, approximately 10-12mm in diameter, characterized by a deep charcoal to peacock luster with high reflective quality. The pearl is suspended from a decorative white metal bail, likely 18k white gold or platinum, crafted in a foliate or ribbon-like floral motif reminiscent of Jean Schlumberger designs for Tiffany & Co. This bail is meticulously pav-set with several small, brilliant-cut white diamonds that add significant brilliance and contrast against the dark body of the pearl. The craftsmanship exhibits high-end jeweler precision with clean prongs and a seamless integration between the decorative element and the pearl setting. While the maker's marks are not visible in the photograph, the style and provided context point toward a contemporary Tiffany piece. The condition appears excellent with no visible scuffing to the pearl nacre or missing stones in the bail. The hardware shows a bright, polished finish with no signs of tarnish or repair, indicating a well-maintained luxury item.

Based on my visual examination of the digital images and provided specifications, this pendant reflects the high-craftsmanship standards associated with the Tiffany & Co. Schlumberger aesthetic. The 10-12mm Black South Sea pearl displays exceptional peacock overtones and high luster with minimal surface spotting, which are key drivers of value in organic gemstones. The foliate bail, pavé-set with high-grade brilliant-cut diamonds, shows crisp metalwork and secure settings typical of luxury house production. In the current secondary market, vintage and contemporary Tiffany & Co. pieces designed in the Schlumberger style command a significant premium over unbranded jewelry, often retaining 50-70% of their original retail value depending on the provenance. Demand for South Sea pearls remains stable, particularly for specimens exceeding 10mm in diameter with dark, rich body colors. However, this appraisal is subject to physical verification. As the maker’s marks were not visible in the provided photography, I cannot definitively confirm authenticity or the exact metallic composition (18k vs Platinum). A full authentication requires an in-person inspection to verify 'TIFFANY & CO.' and 'SCHLUMBERGER' hallmarks, a spectroscopic analysis of the diamonds to ensure natural origin, and an examination of the pearl’s nacre thickness via X-ray if structural integrity is questioned. The presence of original Tiffany & Co. blue box packaging and retail receipts would further solidify the upper end of the estimated value range.