Who knows ! . . . . . and . . ultimately . . does anybody really care what wood it is ?
Whatever it is, . . . it will make a very nice-looking pen !!!
I know that we all would like to know what wood we are working with, but, in "the end", does it really matter ?
Of course, a potential customer may ask . . . "What wood is this ?" . . . and you would like to be able to answer definitively . . Such is life !!!
You could make up a reasonable answer and everyone would be just as happy as if you really knew !!! . .