Great wood and good form however it looks like softwood to me. I found a great piece of wood that I loved too that looked much like the one you have there. I treated it for weeks and placed it in my aquarium. Here is the wood itself:
The wood was great, I baked it @ 175 degrees for almost 4 hours, I bleached the wood and cured it in a 55 gallon rubbermaid barrel until it would completely sink and leaching was non-existent (to a degree). I siliconed slate to the bottom and placed it in the tank ready to go and... it rotted on me in almost no time.
What I learned from 'harvesting my own wood'. Learn your wood. If you can take that piece of wood and sink a fingernail into it or make any dent into that wood it is softwood much like the piece that I fell in love with and isn't fit for the aquarium. Softwood decay under water is tremendously fast when compared to any hardwood you may use such as cedar, mopani, mylasian, or Manzanita. I know that it is an awesome feeling finding a piece of wood but make sure you do your homework on it because wood, like any other foreign substance we put in our aquariums, can damage water quality and hurt inhabitants.
Cheers,
Abe