Vintage St. John Clip-On Earring with Blue Faceted Stone

This item is identified as a single vintage St. John clip-on earring, characterized by its octagonal shape and prominent central blue faceted 'gemstone'. The earring features a metallic, likely gold-toned or gold-plated, base setting. The central stone is a large, circular, deeply faceted jewel, exhibiting a vibrant sapphire-blue hue. Its facets are clearly visible, creating a kaleidoscopic effect with light reflection. Surrounding this central blue stone is a border of numerous small, clear, round-cut pavé-set rhinestones or crystals, which provide additional sparkle and contrast. These smaller stones appear uniformly sized and closely set, indicating a quality setting style. The overall shape of the earring is octagonal, with distinct, well-defined edges on the metal frame that encloses both the central stone and the pavé-set border. The craftsmanship appears to be of good quality for costume jewelry, with no visible missing stones or significant tarnishing on the metal from the provided image. The term 'vintage' suggests an estimated age of several decades, likely mid to late 20th century. As a clip-on earring, it is designed for ease of wear without requiring pierced ears. The primary condition visible is the integrity of the stones and metal finish, which appear well-preserved.

Upon visual examination of this single vintage St. John clip-on earring, I have assessed its current fair market value. The piece presents in excellent vintage condition. It features a distinctive octagonal, gold-toned setting, a large, sapphire-blue faceted central glass stone, and a halo of clear pavé-set rhinestones. The St. John signature, a key indicator for costume jewelry of this era, is present, supporting its authenticity. No stones appear to be missing, and the metal finish is well-preserved with minimal signs of wear. The primary factor limiting its value is that it is a single earring, not a pair. The market for individual costume earrings is significantly smaller, typically attracting buyers seeking replacements for a lost mate or crafters for repurposing. Based on comparable sales of single St. John earrings on platforms like eBay, Poshmark, and Etsy, the price range is consistent for well-regarded but non-precious designer costume jewelry. A complete, matching pair in this condition would command a higher value, likely in the $60-$90 range. However, as a standalone item, its desirability and, therefore, its value are diminished. It is important to note that this appraisal is based on digital images alone. A definitive authentication would require in-person examination to confirm the maker's mark, assess the clasp mechanism's integrity, and test the materials to conclusively rule out precious metals or genuine gemstones, although they are highly improbable for this brand and style.