I felt like making something simple last night while watching TV and knew I had some waxed cotton cord and crystals from a charity shop buy some time ago so I made this,
The knots are called square knots and you can find many tutorials on YouTube if you Google "square knots". Here's a close up of the knots,
Excuse the cat hairs. Nancy the cat sits on this old cardigan when I'm not using it as a background for photos.