Taking the bead head caddis to the next level?

I'll admit, my first thought was if these would catch more trout than a normal drab colored rock case.

http://www.openculture.com/2013/02/artist_hubert_duprat_uses_insects_to_create_golden_sculptures.html

I think it's an interesting concept. I doubt the caddis gives a damn what rocks are available to it. 
All in all I find it an interesting idea.