Common accessory mineral in igneous and metamorphic rocks. Can be biogenically produced by a wide variety of organisms.
IMA Status:
Valid Species (Pre-IMA) 1845
Locality:
Many localities and environments world wide. Link to MinDat.org Location Data.
Name Origin:
Named for Magnes, a Geek shepherd, who discovered the mineral on Mt, Ida, He noted that the nails of his shoe and the iron ferrule of his staff clung to a rock.
Chemical Formula: 