Don't know much about a 'crown jewel' green drake.
Follow this link - I tied these a year or three ago at a fly clinic - drops like almost a rock - have had quite a few stolen by hungry fish...
Thanks to Silent_Light for taking the time to show these to me on a rock in Clear Creek a few years ago. https://www.coloradofisherman.com/for...?topic=69522.0
The wire-inside-tubing thing helps keep abdomen intact after multiple fish - and hemostats - and looks cool too.