Algonquin and Sherwood are from the NARS Holiday 2014 collection. The collection was released with three shades, but I only chose to purchase two. The colors didn't seem very "holiday" to me, so I put them away until now. I enjoyed them both very much and actually wore them for several days, which is rare since I usually change my polish daily.
Algonquin is a grey-ish lavender with pink, blue and silver sparkles.
Sherwood is a coppery, shimmery mauve. I've been looking for a nail color like this for quite a long time. I'm thrilled to have finally found it!