Hi I am from the UK and I came across this unusual seed pod in a charity shop, I have looked online for identification but without success. Have attached a photo to help, showing a pen for size guide. Thanks for looking
Hi! It is a (central columella of a) mahogany-fruit (Swietenia macrophylla) (http://idtools.org/id/dried_botanical/factsheet.php?name=Swietenia%20macrophylla)