I will begin by apologizing that there isn’t much information on Anton Heunis‘s web site.  This necklace, which looks like a combination of semi-precious stones and vintage components, was part of his fall winter 2011-2012 collection. I am guessing, based on some of his other pieces, that it sells in the region of about $1000. You can contact Heunis and his reps through his site for more information.