Cuttlefish Bone Casting Intro

First day of casting class!!  We were told to pick up some cuttlefish bones from PetSmart and I had no idea why so I googled the words "cuttlefish bone" and "casting."  It's a really neat process and a cool texture given to your casted pieces.  I copied a ton of photos and taped them into my sketchbook.  I also found this video on youtube that gave me a great quick intro to the process.  Here's a link.

Image is from this website.