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.
"I, too, love the shape. It is very sad that we had to pick one but this is the right one. The others were wonderful too. I am glad that I had the support of Birmingham City Council, the IAAF and the technical expertise of Fattorini to help us make…"