Step 1: What you need
Saw (bandsaw ).
Sander (Random orbital sander)
Some vessel to glue the mosaic onto (I used a cheap tall narrow ceramic vase)
wood finish (I used danish oil).
Step 2: Choosing a vessel
I chose a tall and narrow ceramic vase. It' quite easy and straight forward to glue the discs onto this one.
Don’t take anything with a concave shape, it’s a pain to sand at the end (the second I did was concave)!
I've also alread used a small pot and a drinking glass. My next one will be a really large vase (1m tall and 25cm in diameter).
you see, it basically doesn't matter what you use, or what material it is made of.
Step 3: Cutting the wood discs
you have to cut thin discs off the branches. I figured out, that about 0.5cm of thickness works quite well.
To cut the discs I used a bandsaw. be careful while cutting! The small discs can shoot away straight in your direction. For security purposes i positioned myself at the side of the bandsaw, and not in front of it. This might work better on a circular table saw... but I don’t have one.
Depending on the size of your vessel, you might need quite a lot of those discs.
The diameters you need depend heavily on the size of the vessel. For large vessels with a big radius you can use quite large discs. For smaller radiuses you should use smaller discs.
The bigger the discs, the less to glue, the more to sand. Basically the time you need for a vase stays pretty constant!