Materials and Features:

• Coro Riviera Marine Architecture: Engineered with an articulated seven-panel focal bib layout where hand-linked scallop shells conform perfectly along the base of the neck, producing a structural, ocean-inspired formation that captures classic mid-century resort-wear elegance.

• Ribbed Scallop Panel Geometry: Features premium cast dimensional shell plaques deeply sculpted with vertical ridges that optimize high-angle light play, with each panel crowned by an elegant architectural mantle hosting three inset emerald green rhinestones.

• Gilt Gold Electroplated Luster: Treated with a heavy, professional-grade gold electroplating bath that resists tarnishing or metal wear, preserving a deep, warm metallic brilliance across all shell faces and intricate chain loops to maintain its immaculate state over decades.

• Vibrant Emerald Chaton Curation: Adorned with a total of twenty-one brilliant green emerald chaton rhinestones, precision-set into dedicated secure settings to maximize internal refraction and deliver high-contrast color pops.

• Spiraled Snail Chain Linkage: Suspended from an exquisite scrolled spiral snail chain (also known as a scroll link chain), featuring intensive flat-wire loops that mimic an infinity swirl to provide sharp, alternating reflective contrasts.

• Low-Density Hollow-Core Base Engineering: Boasting an incredibly lightweight fourteen-and-seven-tenths-gram total mass despite its solid paneled appearance, this non-magnetic chassis utilizes high-purity alloy blanks to ensure a high-presence look with zero fabric drag or neck fatigue.

Type: Low-profile rectangular metal utility fold-over clasp matching a secure, flush female receiver block.

Age/Origin: Circa 1954–1958 / United States (Providence Atelier).

Marks: Unsigned (Definitively attributed to the 1950's Coro Riviera Marine collection; manufactured as an unbranded private-label or boutique contract delivery line).

Other: This spectacular piece is an exceptionally preserved, un-stamped archival survivor from Coro's celebrated Riviera Marine collection. While their signed mainstream releases carried cast-in hard marks, their extensive department store private-label distributions left the physical findings blank, relying entirely on paper display cards. The presence of the specialized combination of three-rhinestone architectural crowns, the signature open-loop panel pins, and the premium gold-plated snail chain linkage serves as an unalterable factory fingerprint that matches true high-end American costume history.

Measurements:

• Weight: 14.7g

• Wearable Length: Approx. 16.5” total end-to-end extended length.

• Focal Panels: Individual linked scallop shell panels measure approx. 0.875” long x 0.625” wide.

• Chassis Thickness: Shell depth measures a uniform 3mm; snail chain measures 2.5mm wide x 1mm thick.

Condition:

Excellent like-new condition. The necklace retains pristine structural integrity and deep gold plating luster across all seven panels and intricate snail chain loops, showing absolutely no surface rubbing, base metal exposure, or links warping out of shape. The emerald green rhinestones remain completely original, clear, and firmly set with zero clouding or foil degradation. The low-profile utility fold-over clasp operates perfectly with excellent tension and flush mechanical alignment.