Thc cartridge/vape question

Let me start off by saying I know all about the bootleg cartridges and that you never really know what your getting when buying one of these illegally, hell even legally you can run into trouble with fake carts. So anyway I live in an illegal state and I am a mom so it’s very convenient to not have to leave outside every time I might need a hit. I use it for my anxiety and appetite. The guy I got this from had just gotten back from a dispensary and it came in a legit looking box, has a barcode, warning label child safety tube and everything it smells good not chemical at all but the question I have is about what’s at the top? It’s a rusty brown color. I’ve never seen anything like it and just wondering if any of you have seen this before, my dad thinks its just the seal but if you look closely it kinda looks like a part of the distillate inside. Should I vape this or not?