Crystal: A perfectly clear plastic case made by SPECK. 

Sage: a silicone case with a soft, faux suede interior. Made by OTOFLY

Falling Snow: a clear plastic case with an extra layer on the back containing pearly white and iridescent glitters that swim slowly with gravity. This one is very lightly discolored around the edges, not perfectly clear anymore, from being exposed to UV light. You can see the difference in the pictures but it's not too noticeable when it's on the phone. Unknown brand.  

Lilac: a silicone case with a soft, faux suede interior. Made by MERKURY

All of them were very lightly used, and taken good care of. The more you buy, the more of a discount you'll get!