In mineral terms the difference between gedrite and geerite
is that gedrite is a form of anthophyllite while geerite is a trigonal bluish white mineral containing copper and sulfur.
geerite
English
Noun
(mineral) A trigonal bluish white mineral containing copper and sulfur.
References
* Geerite in the Mineralogy Database: [http://webmineral.com/data/Geerite.shtml]