Intermeshing – Double Filet Crochet (AKA Interlocking crochet) I had a vague memory of a design I used many years ago, during my table mat phase, based on a diamond shape (which I quite like).
A tutorial demonstrating how to crochet the Interlocking Honeycomb & Railroad Tracks Design. To learn the technique go to Playlist Interlocking Crochet which.