SpaRitual Improvisation is a sheer pink base with blue/purple flecked shimmer. These types of shades are always so difficult to photograph! I don't love it on me, but it's a very pretty polish. I swatched this over a coral base because I thought it would be as sheer as some of the others in the Illuminate collection, but I think this could be worn on it own in 3 coats. The formula is nice. No complaints on that front.
A small selection of SpaRituals, including Improvisation, is now available at Ulta. I believe the retail prices is $12, and you can use coupons on these.