I know, this post expired a few days ago... but I was on holiday!

So, starting from the big pink stone and moving clockwise we have: rose quartz with tanzanite on top of it; turquoise; blue chalcedony; kyanite; and fluorite. The rock outside the plate is aquamarine.

All are rough stones (and a rather rough photo) - I think the turquoise was hard to identify.

Thanks to everyone!