First off, if by any chance Laura J. Perin stops by to read this, yes, I have, in my mind, renamed Amethyst Dreams while I'm working on it black/silver/gray. I hope you don't mind. But I just have a hard time referring to it as amethyst. Not that I don't love amethyst - it being my birthstone and all.
So Linda asked about maybe including a pop of red in this color scheme. I have to say that I don't see it. Maybe as the center motif where the little diamondy thing goes? That would be small. I think I just can't picture it because I see this as monochromatic. I can't wait to see what you decide and how it looks.