I purchased several oz's on Monday from a vendor near to me, and never expected it to arrive overnight, but it did. That means it sat out in the Very hot mailbox for a day and a night. Is it ruined?

No, it should he fine. I wouldn't store it long term like that, but it's fine for a day or two.

@'Bizaro22': > No, it should he fine. I wouldn't store it long term like that, but it's fine for a day or two. Sweet relief! This is a sizable batch and I can't afford to waste the pretty powder! Thanks!

Biz is right, cool dark place going forward but you are ok…