ABSTRACTThis thesis contains a partial edition of a previously unpublished manuscript, De lapidibus et gemmis (MH 59, Lund University Library). The manuscript was probably written in the late XVth century and consists of five parts. Part 1 (ff 1r-1v) and 2 (ff 2r-14r) are written in Latin, part 3 (ff 14v), which is probably later than the rest of manuscript (XVI century?), in German, part 4 (ff 18r-33r) in Latin (some smaller passages in Swedish), part 5 (ff 34r-34v) in Latin and Swedish. The manuscript was written by at least two hands, probably more.I have chosen to examine and edit part 2, ff 2r-14r, which I have identified as a partial transcript of the franciscan Bartholomeus Anglicus encyclopedic work De proprietatibusrerum, probably written between 1230 and 1260.