Quite an important medival German book, that not only lists but also explains the 'science' of stones to his readers would be Daz Steinbuoch by Volmar.
John Greenfield: "A Sermon on Stones? A Note on Volmar's Daz Steinbuoch", Linguas e Literaturas, 1995.
This introductory explanation seems necessary, for motivation, as the following old German text is not the easiest to read:
Volmar, Hans Lambel, St. Florianus, Heinrich: "Das Steinbuch: Ein altdeutsches Gedicht", G Henninger: Heilbronn, 1877.