Authentic 1920s Art Deco Platinum & 18k Gold Colombian Emerald (3.43 ct) & Diamond Necklace

A spectacular, highly intricate realization of interwar glamour and geometric excellence. Forged during the vibrant, high-octane 1920s, this magnificent authentic Art Deco convertible pendant necklace serves as an exquisite testament to the era’s legendary design renaissance. Renowned worldwide for their ornamental complexity and architectural precision, master jewelers of this golden decade seamlessly combined clean, structural lines with bold, contrasting colors designed for high-society wardrobes.

This structural marvel features a dual-metal canvas: a detailed, openwork platinum mounting meticulously paired with a fluid, delicate 18-karat yellow gold chain. The composition’s protagonist is a magnificent natural Colombian emerald weighing an impressive 3.43 carats, displaying an intense, saturated green coloration and cut in a classic, rectangular step-cut profile. Framing this spectacular central gem is a hand-milgrained platinum tapestry set with 16 natural 8/8 single-cut diamonds totaling approximately 0.05 carats, serving as a bright, icy flash of fire that traces the clean lines of the platinum framework.

The Architecture of 1920s Luxury: Colombian Green and Platinum Lace The undeniable allure of an authentic investment-grade Art Deco piece lies in the precision of its metalwork and gemstone pedigree. Colombian emeralds are globally revered for their incomparable saturation and unique, organic jardin—wispy internal inclusions that serve as the hallmark of authentic, earth-born emeralds and impart individual character to this specific 3.43 ct specimen. The classic rectangular step cut (emerald cut) emphasizes the natural, liquid depth of color, allowing the stone to display its rich, velvety verdancy with absolute grace.

The setting is a masterclass in geometric metalwork. Because platinum is incredibly strong yet ductile, Art Deco jewelers could pierce and engrave the metal with absolute precision, creating a lightweight, lace-like crown. The 16 surrounding 8/8 single-cut diamonds are bead-set into stepped, architectural sections, outlined by delicate milgraine detailing—tiny, hand-rolled metal beads that catch the light like fine lace. Suspended from a premium 18-karat yellow gold chain that provides a warm, sun-kissed contrast against the cool platinum frame, this certified heirloom combines under-the-radar quiet luxury with unmistakable antique presence, making it a foundational staple for any world-class estate jewelry collection.

Technical Specifications

• Historical Era: Authentic Art Deco (Circa 1920s Vintage)

• Object Type: Antique Architectural Emerald & Diamond Pendant Necklace (Wisior z łańcuszkiem)

• Pendant Metal Base: Solid Platinum (Officially tested and verified)

• Chain Metal Base: Solid 18-karat gold (Official 750 purity hallmarks)

• Primary Center Gemstone: 100% Natural earth-mined Colombian emerald

• Emerald Carat Weight: 3.43 ct

• Emerald Cut & Features: Step-cut rectangular emerald cut with a lively, organic jardin

• Emerald Color Profile: Highly saturated, intense royal forest green hue

• Accent Gemstones: 16 x Natural earth-mined vintage 8/8 single-cut diamonds

• Total Accent Carat Load: approx. 0.05 ct combined weight

• Pendant Setting Style: Geometric openwork basket with hand-beaded milgraine detailing

• Condition: Excellent Antique Condition (Pristine emerald facet edges, secure diamond settings, and gorgeous age-appropriate patina)

• Availability: Available immediately at Luxos Arts (Insured premium courier shipping)

The Luxos Arts Guarantee of Authenticity: High-carat natural emeralds dating to the Art Deco era represent a prime investment asset and require strict expert validation. At Luxos Arts, our independent estate jewelry historians and master gemmologists utilize high-magnification microscopy to audit every millimeter—verifying the signature hand-fabrication methods of the 1920s, microscopically mapping the diagnostic natural inclusion patterns unique to Colombian emeralds, confirming the solid platinum and 18k gold alloy purity, and checking the setting security. We guarantee the 100% absolute authenticity of this 3.43 ct Colombian emerald Art Deco necklace.