This is wood, real wood, ash wood! Don't go to a do-it-yourself supermarket, they won't sell it. Fortunately there are many forests here in the Alsace in France and I found a sawmill not far from my workshop able to supply this noble wood essence.
I don't know if you can see in in the picture (try to zoom in) but ash wood really has a beautiful wood grain texture. That's why I will transform these boards in supports for my future Archi-Minis (small architectural art objects).
Within a few weeks I should be able to show you the result.
P.S. If you don't find me photogenic, you are right, but there are worse things in life!