La Prairie Cellular Treatment Eye Colour shadows are a splurgy treat. All La Prairie products are, as a matter of fact, and they're hard to resist because the textures really are that awesome. Agate, a neutral wet sand color, is a perfect base color for many makeup looks. On my eyelids (that are naturally darker than my arms) it's a barely-there color that's perfect either for an almost bare look or as a companion for La Prairie Eye Colour in Hematite, one of my favorite blue eye shadows in the known universe.
The texture is gossamer silk and it blends effortlessly. The finish has a light low-key glow that reflects the light ever so slightly. La Prairie Agate is beautiful, understated, wearable, and versatile. The packaging is elegant-- just look at the outside of the compact. It would have been better, though, if the eye shadow came with a usuable brush instead of the silly sponge applicators. It can also be a slippery slope, as all their products happen to be (see also the lipsticks in Quiet Berry and Midnight Plum, or the Cellular Glow cream blush).
Bottom Line: don't say I didn't worn you.
La Prairie Agate Cellular Treatment Eye Shadow ($45) is available from top department stores.