Wow, thanks for all that info. My wife makes jelly sometimes. We could make mango butter if we toss the skins and used the meat and pits, I suppose. Hmmm.....you have me thinking now.
Here is a link you might find helpful in making mango butter. it is from the web site PickYourOwn.org
http://www.pickyourown.org/peachbutter.htm