Robin Hopper Mocha Diffusion Bowl on Foot. Permission of the artist. Photo by Judi Dyelle ← Previous Next → Robin Hopper. Footed Vase.1978. Black porcelain with mocha diffusion;, gas fired cone 9; 17.8 tall x 12.7 wide x 7.6 cm deep. Photo: Judi Dyelle Robin Hopper Mocha Diffusion Bowl on Foot. Permission of the artist. Photo by Judi Dyelle