This is my absolute favorite, it's angora bunny:
Not only do these fibers have a symmetric and even scaling pattern, they are also thinner than silk. Just so you can compare, here's two other fiber samples:
One of them is wool, the other one is dog, can you tell them apart?
I put these and other pictures along with a lot of information in a wiki. Go take a peek if you have time and tell me what you think: http://textilefibers.pbwiki.com/
Meanwhile, I promise to work some more on the pink thing.