Eleven Objects is an accessory line created by Linh Thi Do and Christine Rhee. These embellished collars are from their first Fall/Winter 2011 collection.
Unfortunately the prices are between $135 - $1,195 (for a Swarovski embroidered one)
but the Carven collar that sold out at Colette in 25 minutes went for $135 as well (though pretty it was very plain)
The cheaper option would be a DIY which I am very tempted by. The last two are my personal favourites.