I'm a bit confused by velvet, and wondering if anyone can explain the different types, and how to tell them apart.

I like velvet for holidays and dressy winter outfits, and have been looking for velvet tops. Some velvet seems very shiny and reflective, like the blue Pilcro buttondown I've added from Finds. Other items seem to have a softer sheen, like the black velvet top in the other Find below. Not sure if it's the fabric formulation or just the quirks of photographing velvet that makes such a difference. Both of those finds list the material as viscose and nylon. So far as I've seen so far, price point doesn't seem to clearly correlate with fabrication - I have seen viscose and silk, or viscose and rayon, but mostly viscose and nylon.

What fabrication makes a velvet a high quality wardrobe item? Any tips on what I should look for to find a top that's not super shiny?