Thanks! The shard is pate de verre, ground leaded glass and finely ground (by me:)) glass enamel colorants, based on an old Minoan vase. It's attached to a PMC back plate made with a polymer plate impressing Minoan letters. Fun stuff.
"Call for Submissions – Essays, Reviews, Poetry, Visual Arts
published every six weeks, this online journal explores the political, aesthetic and conceptual qualities of craft and the decorative, from modernist experimentation in the early…"