Think in a resistant knot!

A lot of my jewelry requires knots of the kind shown below -  or else it will open and open again.

Please see the photos and the text underneath: knot your cord this way so that you do not loose your jewelry.

First take the two endings together.

Second make a normal knot with the two cords at the same time.

Next, press hard the knot to make it stronger.

This knot will allow you to open it easy as well.

Hope you got it right!

TIP: Remember the way you close a balloon? This is very similar.