Knitted on 5" DP US Size 4 needles with Gatsby Lux by Katia. It is a metallic knitting thread that comes in a nice selection of colors.
Ever since I spied this tree on Pinterest (view source here), I have been wanting to make one. Here is my version. The base is an old Starbucks store decoration that I stripped down to bare styrofoam and covered in vintage French music paper. I have two more of these trees in my attic waiting to be refurbished. I want to do one in all different sizes of pastel pearl beads. Haven't decided about the last one yet.