Chanel Alchimie 591 ($27 for 13 ml/0.4 fl oz, Nordstrom.com) is new for fall. It's a mossy olive shimmer with a hint of gold and khaki. The color has a very smooth streak-free shimmer and applies beautifully with two coats. I'm usually not a fan of greens on the nails or olive colors since they tend to clash with my yellow/olive-toned skin, but Chanel always does greens beautifully. I've worn this for almost 4 days now and I've had no chips or tip wear. I love that it's a work-appropriate neutral with a bit of edge.
Many have asked how it compares to Peridot from several years ago. Here are some swatches and photos. Peridot has a more visible shimmer/iridescent quality. It's also brighter and more yellow/gold. It literally glows on the skin. Alchimie is a more subtle and conservative version with more olive and green. I think they are different enough to justify owning both.
Alchimie is definitely a must-have. The Chanel fall collection is starting to trickle in stores now. I spotted the items at my local Neimans and Nordstrom. It should be arriving at all Chanel counters and online soon. For now you can find it online at Nordstrom.com.