The molds look so pure and smooth and lovely! As an experiment, I tried lampworking some glass into approximately the correct shape and size. Some leaves are filled with green and clear frit.
Ready to go into the kiln:
And out of the kiln. Note that one mold broke as I took it out of the kiln, they are very fragile after they've been fired and can be used only once. Some glass flowed well, some didn't seem to get quite enough heat to make it flow flat, and it bunched up on itself instead.