The bowknot needs only short length of wire and is simple and easy.
I made this by using a leftover piece on the desk, not cutting wire from the spool.
Persistence is very important. I drilled two holes of stones. The stones are quite hard to drill. I drilled them last year but failed. Yesterday I was determined to drill through the stones. I thought the holes would be drilled, only if I kept drilling. Finally the stone could not resist against the drilling.