My dear friend bought a lovely shirt which had crochet lace around the sleeve and hem. As she was leaving home one day, she caught the sleeve on a snag and ripped it. She brought it to me to see if I could mend it. After some careful thought, I figured it out!
It’s not perfect, but to the naked eye, you can’t tell!
To do this fix, I used same/like colored thread as the original. I sewed a few loops of thread between the two broken pieces and left the same distance between them as was there before. Then by grouping together the original frayed threads along with my added threads, I looped the thread around them to create a cord. From a distance, you can not tell the “fixed pieces” are corded thread because they blend in with the original crochet links.
Be sure to follow the original pattern in logical order so all the connections are reestablished and it mimics the original pattern. Good luck!