Polished Black Onyx Disc Beaded Necklace with Sterling Silver Clasp

This is a sophisticated matinee-length necklace consisting of uniform black onyx beads, displayed on a stylized fabric dress form. The beads are fashioned into flat, coin-shaped discs, meticulously polished to a high-gloss, mirror-like finish that reflects ambient light. Based on the provided context, the stones are natural black onyx and the strand is finished with a sterling silver clasp. The construction features individual beads strung closely together, likely on a silk or nylon jewelry thread, which provides a flexible yet sturdy drape. The deep, jet-black color of the onyx is consistent throughout the strand, indicating high-quality mineral selection without visible inclusions or color banding. The sterling silver clasp (not fully visible but noted) serves as both a functional closure and a quality indicator, typical of mid-to-late 20th-century jewelry or modern artisanal pieces. The condition appears excellent with no visible chips or scuffs to the stone surfaces. The minimalist, geometric aesthetic suggests a contemporary or late 20th-century 'Modernist' style, making it a versatile accessory for both formal and professional attire.

I have completed a visual examination of the Polished Black Onyx Disc Beaded Necklace. The item presents as a matinee-length strand of uniform, coin-shaped natural black onyx beads. The material displays high-gloss polish and excellent color consistency, which are hallmarks of high-quality mineral selection for designer or premium artisanal jewelry. The use of a sterling silver clasp further categorizes this as fine jewelry rather than costume. The condition appears to be excellent, showing no evidence of 'flea bites' or surface dulling often found in older strands. From a market perspective, black onyx is a semi-precious gemstone with high availability; therefore, the value is driven primarily by the precision of the lapidary work (the disc cut) and the brand or artisan provenance rather than the rarity of the mineral itself. This specific geometric 'Modernist' style remains in steady demand for professional and formal wear. While this visual inspection suggests authentic materials, certain limitations exist. Without a physical examination, I cannot verify the specific gravity of the stones to rule out dyed chalcedony or glass stimulants, nor can I inspect the hallmarks on the sterling silver clasp for maker's marks, which could significantly increase the value if linked to a known designer. A full authentication would require a hands-on tension test of the stringing, a microscopic inspection of the bead holes for chipping, and verification of the metal purity via a chemical or X-ray fluorescence (XRF) test. The provided estimate assumes authentic natural onyx and a functional, hallmarked sterling silver closure.