Here is a handy little reference guide for finding natural fibers in the thrift store!

chapters
00:00 intro
00:35 what are natural fibers?
01:15 how to identify natural fabrics
02:05 identifying linen
03:01 identifying cotton
03:38 identifying silk
05:53 is it silk? the burn test
07:20 time to go thrifting!
07:48 the texture test in action
12:14 my haul
12:25 outro

If you try this out and find it helpful, let me know your thoughts in the comments!