Here are some recycle and re-purpose DIY ideas, when a glue gun would certainly come in handy!
Monogrammed letters decorated with broken jewellery
Bling Bird Decorated with Broken Jewellery and Souvenir Spoons
Broken Jewellery Made Into A New Necklace
Matchbox Turned Vintage Inspired Earring Box
using broken jewellery, paper, glitter and sequins,
Image source and tutorial here
Vintage Jewellery Mirror
Vintage Upcycled Brooch
Broken Jewellery Become Statement Rings
Vintage Jewellery Inspired Cuff
Vintage Custom Jewellery Bridal Bouquet
What do you do with your unwanted, or broken jewels?