The color I'm wearing today is called Mushroom Glitter by NYX. No idea where they got the name, as it's not mushroomy to me at all, but it's a gorgeous shade so I'm willing to overlook it. Mushroom Glitter is actually a very sheer microglitter; if you're really persistent and do 5 coats like me you can get this foil effect, but at one coat it's for all intents and purposes a microglitter topcoat. Luckily, it has good drytime and an easy-to-work-with formula, so doing coats isn't as terrible as it might be.
The color is unique from other silver foils in that it's more of a very pale "white gold" (i.e. slightly yellow-toned) rather than straight cool-toned silver, which makes it really flattering to my warm skin. It's also one of the rare non-gritty glitters, probably because the glitter particles are so fine--I'd run out of topcoat when I did this, but even without topcoat it's pretty smooth.