Minerals that often display parting include the pyroxenes, hematite, magnetite, and corundum.
en.wikipedia.org The deeply weathered lavas retain their original textures but have been pervasively stained and altered to earthy hematite and siderite.
en.wikipedia.org Some examples of anhydrous secondary minerals include many carbonates, some sulfates (e.g., anhydrite), and metallic oxides such as the iron oxide mineral hematite.
en.wikipedia.org The mineral occurs in cavities in sedimentary iron and manganese deposits in association with arsenoclasite, shigaite, hematite, hausmannite, triploidite, barite, and manganoan ferroan calcite.
en.wikipedia.org This includes iron ore, magnetite, hematite and often pyrrhotite.
en.wikipedia.org