I thought it would be nice for my wife and daughter to have (almost) matching rings and found an 'ible that made a celtic knot shotglass. If you look in my favorites, it is listed there. This was a new technique for me but as it turns out, not hard just time consuming.
I had a piece of 1x2 pine and a walnut? picture frame that "fell apart" lol. It is possible that my next 'ible will be a picture frame if my wife reads this. You will want 2 woods that contrast enough to be able to see the knot when it is done. I used my drill press with lathe attachment and drum sanders and my band saw to rip the frame square