When you look on line you can find a lot of web sites showing “stump” tables, many of which are made from a piece of log, not a stump.  You should be able to see some flaring of the tree’s roots at one end of a true stump table.  There is only one stump table in a tree, the rest are log tables. I use primarily maple & red oak & most pieces have at least one interesting feature: a knob or cutoff branch for example. All are debarked, dried & sanded smooth.  Some are stained, some are left natural.  All are finished with multiple coats of polyurethane, usually 3 on the side & 6 on top. You can see some samples here.