a couple other images of Pecan can be found here under the name Carya Illimoensis,
along with hundreds of others. (They provide samples for collectors, as well as veneer)

as far as 'hard', I find Ebony more nasty than hard. It produces black dust that is worse than powdered charcoal. It IS hard, but fortunately, I never have to saw large pieces, and on a lathe, the harder the better for clean cuts and sanding.

I often work with Lignumvitae, which is about the densest well-known wood available, but on a lathe, it is a delight. I also sometimes do Snakewood from Guyana and Desert Ironwood and Vauquelinia california (sometimes called "Arizona Rosewood") from Arizona, which are sort of off the scale.

But I do agree with Q that Ebony is SO dense that is it quite hard to saw or work with small tools....one the most unpleasant woods to work.

But they are a challenge worth the trouble..

There....aren't you glad you asked about Pecan? *grin*