No idea what it is, but I will have it id'd b y someone who will know.
Looks almost the same except a bit darker.

BTW I tried the suggestion about gluing it and despite all my strength
with a good vise I couldn't get it to come together.

So! What I've done is used my chop saw to cut it in in two even pieces
and will glue a piece of walnut or mahogany in between and turn it again
- Should be interesting to see if the idea works...It certainly won't
warp again and should look nice :O)

Keith P