I have broken many a special piece of pottery in my time. I used to go to my college pottery shows and find some favorite pieces that traveled with me home to Virginia, New York, and now to Maine. The majority of them are no longer in one piece. I was used to this, but it was a sad day when it happened to my favorite platter from Campfire Pottery. I've held on to it for a few years knowing I would try out the art of Kintsugi on it one day.
Kintsugi is the art of repairing pottery with gold lacquer to highlight the break as a part of the item's history instead of hiding it. It is a Japanese word that means "golden joinery".
I used a method of mixing a two part epoxy in the syringe with gold mica powder. You want to make sure to use the quick drying epoxy that sets in 3-5 minutes. I watched this youtube tutorial from HGTV Handmade for advice. Here is another great one from Kin.
I really wish I hadn't thrown out my old broken favorites, guess I have an excuse to be clumsy or find new pieces to break at Goodwill.