You really can't see what I'd like to show you about this polish combo in this picture, but it's all I've got:
This is Formula X Cosmic (which was on clearance) with Jin Soon Gossamer on top. You can see that Cosmic looks pretty shimmery and purple in the bottle, but it's not really visible on the nails. (I had read reviews that said exactly this before I bought it, so I shouldn't have been surprised.) It goes on just as a dark blurple with maybe a slight shimmer. Gossamer on top of it actually did a good job of faking the look I wanted from Cosmic alone - that's the part you can't really see. (Jin Soon's website is here but I'm pretty sure that Gossamer is discontinued because I bought it from a clearance sale at Space.NK or somewhere back a couple of years ago.)Oh - also, Cosmic is really really near to being a one-coater. I would have said it was, but it pulled a bit when I put the top-coat on, so I'd probably recommend two coats to avoid that. You can't see it unless you look really close, though.
Before these I had on a couple of different greens, because I was in St Patrick's Day mode. I started with Cirque Lichen, which I really love - it's a shimmery dark olive, I'd call it. I wore that a couple of days, and then when it chipped a bit I added a green glitter on top of that - I have so many green glitters that I pulled three out of my stash without even looking hard, and that's not all of them. I asked my husband if he had a preference (I believe the three were RBL Locavore and Meow Meow, and Nostalgic Patricia) and he picked Patricia, so I patched up Lichen and put a couple of coats of Patricia on top. I really like Patricia so that was a good choice as far as I'm concerned.
After it was too late for this St.Pat's Day, I found this picture from last year of Pretty Serious VT-100 with matte top-coat. I really need to wear that one again, St.Pat's or not.