More than a symbol, the volcano is our inspiration.


Strong, brutal, radiant, connecting heaven and earth, it is the most powerful element for Kaldera.

This is why our jewelry is made from fully recycled 925 silver, often incorporating lava stone.

Perfect "anti-gemstone", lava stone is unusual, transgressive, matte, porous, and has no reflection or transparency: a symbol of daring, power and magic.

“Raw and minimalist”: this is Kaldera.


Our process is like our materials, natural and simple: starting with sketches followed by the first volume analyzes, refining our vision of the jewel, and we then develop the technical drawing. Our wish is to bring real consistency to each of our product designs, with high quality materials and a unique look.

"We want to offer a new angle of approach to jewelry, with the forces of nature as a source of inspiration at its center, and through an identity and a very distinctive. " Morgan Sizlak

From a quick sketch to the first volume analyzes, the vision of the jewel is refined and the technical drawing can be developed. We bring real consistency to each of our product designs, with high quality materials.

Minimalist and responsible jewelry !!

The workshop

They are indeed made in the foundry and workshop that we share with Kadek, a traditional Balinese silversmith.

This decision to work with this house comes from our desire to respect its knowledge of the methods of making and processing silver, which has remained unchanged for several generations.

Our goal? Apply them also to our "minimalist ethnic" creations, using of course recycled silver and thus remain in line with our ethics.


David and Morgan have lived in Asia for several years and met in Jakarta during fashion week.
Over time and sharing common visions, they became friends. By working together on artistic, design and photographic creation projects, a real common passion was forged for all the projects that really made them vibrate: ethical projects.
By detaching themselves more and more from the “corporate world” and by spending more time exploring their personal projects, it was during a morning climb of Mount Agung that the idea came, quite naturally, while contemplating this mystical, chaotic, raw but also minimal landscape.
Sitting there on the “K” aldera.