Click on picture to enlarge
This tangle is called 8 of diamonds because simply, that's how you form it. It can be used as a straight or curved string and it turns corners easily. This tangle pattern is based on an calligraphic ornament.
To do this pattern begin with dots spaced evenly. At every other dot place a diamond shape. The diamond shape could have straight sides but I think it looks best with concave sides (curved inwards). At the remaining dots draw small figure 8s. Start connecting the dots at the middle of the diamonds with the dots at the 8s with curved lines. As you make these connections you will notice that you are actually drawing large figure 8s. As you are drawing these you will also be making an 'X' in the middle of the diamond. Finally, draw curved lines that begin with the ends of the X on the diamond. - This takes much longer to explain than to actually draw!