The fruit of Pouteria Lucuma is a little sharp at the end. But your picture doesn't show the sharp side
Can you take a more clear pic? please
These are an atypical shaped lucuma by the looks of them. They have a small nipple at the bottom, as pictured in two pics, but are much more round in form than the normal type.
Stephen, have you tasted these ones? Are they dry or a bit moist, sweet or bitter?
Thanks amigo!