I found several interesting things while walking the beach last month just south of Visby, Gotland Island, Sweden. I wasn't even seriously looking, but these caught my eye. Three I can identify, but one has me scratching my head. It's been suggested it's a fossilized sea urchin, a bead from the Viking age, and perhaps a whorl used in spinning thread. All old, but I'd really like to know what exactly this little gem could be. It's about the size of a Cheerio, rock solid and smooth with a hole started on both sides.