Sorry! I thought I was replying to @ChirpyChicks1. (For whatever reason, I didn't look to see who was posting. Just assumed I was getting a reply to a reply. Oops.) I thought she could find the thread where she saw the good advice and show it to us.
Can you find the thread where the person had trouble and got advice, copy the website address, and paste it into your next message? It could be pretty helpful.
I've never had quail, and I've never seen anything similar with chicks, but sometimes, especially in high humidity, my ducklings leave something that looks very much like that behind in the shell. These three might know more:
@JaeG
@007Sean?
@Pyxis?