Dedicated to Gourd Crafters, Artists and Gourd Art Fans
I've used egg shells and some little tiles from Michaels. My guess is if your tiles (glass) fell off I would question the glue you used to hold them on the gourd. Slow drying glues make it hard to create a mosaic on a round vertical surface. I use fast curing to hold the pieces in place then use some kind of grout to hold the pieces in place.
What was your method and what products did you use?