The manufacture of a ring with a coin is a classic of jewelry.

Over time and whichever the countries, there are relics or old rings with coins of time gold or silver mounted ring.

These parts can be mounted or crimped or be bent in order to partially compose the ring body.

Still today in France, many people custom made rings with pieces of gold louis or gold napoleon coins that have historical value as well as pecuniary.

Portugal ring

Custom ring from Portuguese coin 

As we will see in this article, the project that follows, we describe the creation of a signet ring for men surmounted by a relief engraving taken from the coat of arms of Portugal present on a Portuguese coin struck in 1948.

The ring design from the coin

Our ring design is that of a simple signet ring topped with the embossed copy engraving of the face of an old Portuguese coin.

Portuguese coin

This coin isn't in gold while the project of ring is pure yellow gold of 18-karat, it is not possible for us to mount the coin on the ring, so we'll have to reproduce the pattern.

We then use the computer tool to create a 3D modeling of the ring showing the engraving of the face of the piece by making a modification to the date of 1948 replaced by 1984.

Ring design visual

Views of digital mockup of ring project with coin

This virtual mock-up allows us to modify the source design at the same time and to ensure that the final rendering is fully in line with the expectations of the project sponsor.

Portugal ring model

Views of virtual photos of our project before its launch in manufacture

Once the design is validated, we can start the physical manufacture of our ring by the 3D printing process to obtain a resin model of our ring.

wax model

3D printing view of our digital mockup

Ring manufacture in gold 

In possession of the resin physical model of our ring project, we can move to the lost wax casting stage.

A refractory plaster mold is created, containing our resin model. The latter is then burned in order to sublimate the resin model which leaves a hollow space in the mold.

The molten yellow gold is then poured into the mold, the liquid gold then occupying the space left vacant by our resin model.

This video shows the steps of this process.

This process allows us to obtain our raw gold ring in accordance with the digital design and physical model obtained by 3D printing.

Portugal ring

Gold ring at the exit of the foundry stage

As you can see in this picture, we can see on the cast iron ring all the details of the coat of arms of Portugal visible on the reference coin shown at the beginning of the article.

Starts then the finishes with the times of fonts and the polishing of the ring and details of the engraving on the plate.

Portugal ring

Front view of engraving of the ring tray

Portugal ring

 Portugal ring worn on finger

Signet ring worn on the finger


Here are some examples of manufacture of gold rings with engraving of blazons, medals, coats of arms or seals made in our jewelry workshop :

christian gold signet ring Templar gold signet ring Military ring


For further :

September 23, 2019 — Hugo Maherault

Leave a comment

Please note: comments must be approved before they are published.