My son returned from Svalbard (400 miles N of Norway) last month and today he presented me with this "rock", and asked me if it was a fossil. He said he found it along a mixed field of glacial morraine, in one of the rare non-protected areas where rock hunting is permitted, close to Longyearbyen in Spitzbergen. He mentioned that there were no other "rocks" similar to this in the area he explored. The "rock" measures 3 1/4" wide, 2" long, and 1" thick and is rather hefty at 0.6 pounds. The hexagon pattern and the very smooth sides are quite unexpected to me. At first glance I thought some kind of bryzoa. Then I noticed the overall shape was clam-shell like. Under a magnifying glass I then thought it may not be a fossil, since I couldn't find anything beyond the general hex pattern . My son thinks it looks bone-like, but it is rather dense/heavy. Then we thought perhaps meteorite material. It's definitely a nice "rock" and am happy to have it as a gift. But does anyone have any insight as to what it may be? Thanks.