It's knit in Elann's Baby Silk in Cornflower, which is just delightful. It's super soft and fuzzy but not too warm. I love it.
The pattern is from a book called Luxury Knits. I had bought this book for a v-neck raglan pattern in it that I thought my mom would like, but she ended up picking this lacey one. I'm done the back, hurray!
Here are some other patterns from this book that I kinda like:
Reminds me a little of Green Gable, but lace on the sleeves.
I plan to use this stitch pattern on some Rowan Kidsilk Haze...
Most of these patterns are a bit oversized and not very fitted, but that can always be changed. The stitch patterns and basic shapes are really lovely, and I usually end up tweaking patterns anyway. I would recommend this book for some nice lacey patterns in a variety of styles - cardigans, pullovers, short/long and sleeveless versions. But you might need to change up the sizing a bit and add some shaping.