Mixed Stone Beaded Necklace with Sterling Silver Clasp

This is a beaded necklace measuring approximately 18 to 20 inches in length, featuring an alternating sequence of polished stone beads. The design utilizes large, marquise-shaped (oval pointed) focal beads in two distinct varieties: a pale, milky semi-translucent light blue stone (possibly chalcedony or amazonite) and a dark, translucent brownish-black stone (resembling smoky quartz or obsidian). These larger beads are separated by small, round faceted spacer beads in a matching dark tone, providing flexibility and rhythmic contrast to the strand. The necklace is secured with a lobster-style clasp. According to the provided context, the hardware is marked '925,' indicating it is composed of sterling silver. The construction appears to be high-quality hand-stringing with consistent bead selection. The condition is excellent with no visible chips to the stones or significant tarnishing on the silver hardware. The style is contemporary yet classic, likely produced within the last 20 years, falling into the category of boutique or artisan-designed bridge jewelry. The smooth polish on the marquise beads indicates professional lapidary work, and the symmetry of the design suggests careful craftsmanship.

I have conducted a visual analysis of this mixed-stone beaded necklace. The piece features high-quality lapidary work with marquise-cut light blue chalcedony and smoky quartz, separated by faceted quartz spacers. The hand-stringing displays consistent tension and professional finishing. The '925' mark on the lobster clasp indicates a sterling silver composition, which classifies this as premium bridge jewelry. The stones exhibition no visible fractures, and the polish remains vibrant, suggesting excellent condition. In the current market, artisan jewelry of this caliber typically commands a boutique retail value based on stone weight and design complexity. Comparable sales of hand-assembled semi-precious necklaces of this length and material composition range from $120 to $200. Demand for geometric layouts and neutral earth tones remains steady, though these materials are not considered rare. Key value factors include the symmetry of the cut and the quality of the translucent inclusions. However, an analysis from photographs has inherent limitations. I cannot definitively verify the mineral species of the blue stones (which could be chalcedony, treated agate, or amazonite) without refractive index testing. Furthermore, the '925' stamp, while consistent with the hardware's appearance, does not provide a definitive assay for silver purity. A full authentication would require in-person inspection of the thread integrity, a streak test or spectroscopic analysis for mineral identification, and a thermal conductivity test to distinguish natural stones from high-quality lab-grown or treated glass simulants.