Researchers Uncover Lost Ming Dynasty Goldworking Technique for Royal Jewelry Replicas

On July 3, 2026, researchers from the China University of Geosciences revealed a groundbreaking discovery regarding a lost goldworking technique from the Ming Dynasty, known as Jin zhe si. This ancient method allows for the creation of intricate jewelry replicas without the use of wire, a significant advancement in historical metallurgy.

Unveiling the Jin zhe si Technique

The study published in NPJ Heritage Science details how Chinese goldsmiths of the Ming Dynasty were able to produce elaborate jewelry pieces, including a pair of gold earrings discovered in the tomb of Prince Zhu Zairong, who died in 1545. The earrings, shaped like double gourds, exhibit a unique structural design that was meticulously examined using advanced microscopic techniques.

Lead researcher Zhihao Tian and his team conducted a detailed analysis of the earrings, uncovering that the surface featured a fine, corrugated texture produced by layering thin sheets of gold. This innovative approach deviates from traditional filigree methods that rely on wirework.

Reverse Engineering the Past

Utilizing historical records and modern reverse-engineering techniques, the researchers successfully reconstructed the Jin zhe si process. The result was a replica gourd earring that matched the original in form, surface texture, and weight within a margin of just 1 gram. This achievement marks the first successful recreation of the technique, providing insights into the craftsmanship of Ming Dynasty goldsmiths.

“Unlike traditional 'filigree,' which involves applying actual plain or twisted wire... the technique explored in this research does not involve true wire at all,” the authors stated in their findings, highlighting the distinctiveness of Jin zhe si.

Challenges in Replicating the Technique

During their experiments, the team also attempted to recreate the earrings using silver and aluminum, but these materials proved unsuitable, either tearing or failing to maintain their shape. The research indicates that only high-purity gold can be folded repeatedly into thin structures without compromising integrity.

• Gold earrings were crafted from thin gold sheets.
• Surface texture achieved without wirework.
• Replicating the earrings took about one day per piece for skilled artisans.

This study not only enhances our understanding of ancient goldworking techniques but also emphasizes the remarkable capabilities of Ming Dynasty artisans.