Ruby - The King of Gems

By Joanna Hardy

Technologie du sertissage

By P.A. Grether

JAR I

Emerald - Twenty-one...

By Jonathan Self and Joanna Hardy

The Technology of Setting

By P.A. Grether

JAR II

Gemstones

By Keith Wallis

Technik des Edelsteinfassens

By P.A. Grether

Tanzanite, born from Lightning

By Hayley Henning and Didier Brodbeck

Manuel d'apprentissage du...

By Loosli/Merz/Schaffner

Modell-Lehrgang für...

By Loosli/Merz/Schaffner

Chaumet Tiaras

By Clare Phillips and Natasha Fraser-Cavassoni