Since I found the pattern via this comm once upon a time, it seems only fitting to post the finished result here. The sharp-eyed viewer will notice that I switched the light and dark colours, since I used the dark as the main colour. I also gave the celtic knot motif a miss, so that's why you're not seeing any pics of the underside -- all that's there is a couple of stripes.
The graphite black yarn is Schachenmayr Alpaka, and the variegated yarn is something expensive with wool and silk in it. I've lost the wrappers/tags, unfortunately, but both yarns are silky soft to the touch.