before and after

 

 this is before firing

 

this is after firing with clear glass 'edges' framing  the central piece.

I added those afterwards and re-fired it.

I over-fired the piece, so the pattern has mishapen, and has a couple of holes,

but I'm quite happy with this.

I could also neaten up the corners to square the piece up more - but haven't as yet :o)

(I usually use COE 90 glass)