To create this speckled piece, Kingston, New York–based ceramicist Robert Kessler  works with zinc-based glazes that form crystals when cooled slowly after firing. Visual variations are made by adding amounts of cobalt, zinc, iron, silver, and tin oxides.   Hand-thrown and Glazed

Hand-thrown and Glazed

To create this speckled piece, Kingston, New York–based ceramicist Robert Kessler works with zinc-based glazes that form crystals when cooled slowly after firing. Visual variations are made by adding amounts of cobalt, zinc, iron, silver, and tin oxides.

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