I think it's Chestnut. I have a coffee table (gift from a good friend) that has flat panel that looks like that, but in natural color. He was working in a furniture mill when a large chestnut beam came into the shop. He made the table from cut off scraps from a large chest that was being made out of the beam. The grain looks like that.
I have a funny/sad story about a friend who had saved about 6 30 foot 6x6 beams that he was going to be using in remodeling his recently purchased barn. He was remodeling into a house for living. I was building a fireplace and chimney for the project. The house (from here, we will call the barn as a house) was on a level lot except the end where we were building the chimney had a very steep drop of about 6 feet elevation in about 8 feet. That presented a problem with scaffolding requiring we build a level deck to set my steel staging frames onto. Not an unusual situation in Connecticut. I had brought in a pile of 6x8 ties (beams) to built the deck, but had dumped the pile at the edge of the driveway at the far end of house from the chimney. I had already constructed the base of the chimney out of concrete blocks up the the top of the house foundation. I had moved in side and was working on the fireplace construction and had told my helper the build the scaffolding deck while I was doing the firebox. He had done the deck thing on other jobs. I had dumped enough beams for the job and in such situations, we often had to cut beams to fit the grade or for bracing, or whatever the need. I paid no atrtention when I heard the chainsaw reving thru wood. That was a usual sound.
As I was finishing up inside, the owner showed up and voiced his approval of the job I was doing. After a short chat, he continued on to check the goings on out side. All of a sudden, I heard a very loud exclamation, "OH NO!!!" Silence.
I ran out side and there was my friend, Sam, leaning against his arm against a tree. He was saying nothing. Sam has always been a very jolly type person. He has been a smart business man who is always ready to pounce on a good deal which seems always to turn into a great deal. I had known him for more the a dozen years at the time. I had never heard a pessimistic remark from him. The sort if you gave him a lemon, he would make lemonade. I looked around to see what had upset my friend. My helper looked confused.
I did not have far to look. Sam had shown me his latest "deal" a few days before. He had shown me a pile of Chestnut beams at his father's house. He had rescued them from a demolition and was going to use in his own house. The beams were each 30 feet in length and hand hewed to 6x6 or 6x8. A valuable find.
Sam had delivered those beams to his own house the nite before and had taken the time to lug them to where I had my bricks and sand piled. I had not known, nor had my helper known of Sam's delivery. I had delivered my constuction beams in the dark of the nite AFTER Sam had made his delivery. My helper had looked at Sam's beams piled alongside of our bricks and sand and thought those were meant for the deck construction. Neither one of us had looked before I started my inside work. I had gone over the outside work the afternoon before with my helper and told him I would be delivering the construction beams for him to work with afterdark. He knew what to do.
Sam, as I have mentioned, was, and still is, a happy guy. He was unhappy for little while, but we are still good friends nearly 50 years later. My helper is still my friend altho he now lives about 200 miles away. None of the three of us have ever made the same mistook again, I assure you.
Tinker