Barro is created using an ancient, region-specific process, and represents the conjunction of craft and innovation. It begins with gathering earth from the surrounding areas to make the clay. Water is added to slake the clay and create slip, which is then poured into handmade plaster molds. The clay pieces are each hand burnished before firing with the help of a smooth stone, to achieve an iridescent color and smooth feel.

Caterina chose to work with local artisan Amando Pedro in the production of the pendants because of his high level of expertise, and his sensitivity to using traditional techniques to achieve modern, unexpected shapes. In creating the pendant, Caterina took into account the history it can show, paying tribute to the Oaxaca black clay tradition in San Bartolo Coyotepec, while also imprinting it with a distinct style, expertise and contemporary vision. This is how tradition and innovative design are brought together in Barro.