Last month I was at a BBQ and the house next door was cutting down their beautiful Eucalyptus tree. I noticed they had a lot of spare tree trunk chunks, so I asked If i could have one and they said "Sure!". I hauled the 150lbs stump back to my home and turned part of it into a beautiful stump wall clock.
I made it at TechShop San Francisco and it was very easy to do!
Step 2: Saw the clock off
Now take the cross cut saw and begin sawing along this line. Saw in few strokes so that there is a cut about 1/4" deep everywhere on this line. This way your saw will be able to follow the line when you cut. Now use a lot of elbow grease to saw through the stump.
This took me 3 sessions of about 40 minutes of sawing. Its a lot of work but at the end you have something really nice.
Step 3: Glue the back
Step 4: Drill clock hole
Now drill a 1/4" hole in the back of the slab 3/4 of the way between the center and perimeter. Don't drill all the way through. This hole will be used for added support when hanging the clock.