Oh yeah this is pretty cool. I think I might actually know this band somehow because the cover art looks insanely familiar.
I thought they were called Amethyst or some kind of gemstone, but that might be the purple flower thing throwing me off.
Sounds like it could be Saracen?
Or maybe these guys, your description made me think of them even though they're Kiwis:
Amethyst is/was a heavy/prog band from Australia but they were from the 90's. Female lead, one EP, one album which is on YT.