Thank you so much for being interested in the wooden surface! It is a table, though it could also very well be a coffee table because I the original wooden panel was to long for the dining table i bought it for so I sawed the rest off and made a coffee table by upgrading an old IKEA LACK table I had laying around. However this picture is taken on the dining table . As for the ring I sadly do not remember the exact point in time it happened but I strongly suspect that it was coffee inside of mug which I regularly drink, in the morning, on that table. Regarding the used wood I am afraid I must disappoint you once more as my knowledge on it lacking. I have bought it in a local DIY shop in Germany so the chances are pretty high it was harvested in that area, however I guess you cannot be too sure about that nowadays. And as it not one solid piece of wood rather glued together I unable to count the age prior to harvest. Sorry about that. Im feeling a bit ashamed I do not know as much about the wood I dine on everyday, but if you have any further questions im happy to help.