diff --git a/sci/Magnetite.wiki b/sci/Magnetite.wiki
new file mode 100644
index 0000000..bfcee8f
--- /dev/null
+++ b/sci/Magnetite.wiki
@@ -0,0 +1,6 @@
+= Magnetite =
+
+Magnetite is one of the main iron ores, with chemical formula Fe,,3,,O,,4,,. It
+is one of the oxides of iron, and can be ID'd because it is [[ferrimagnetic]].
+
+== Identification ==
diff --git a/sci/ferrimagnetic.wiki b/sci/ferrimagnetic.wiki
new file mode 100644
index 0000000..873d44d
--- /dev/null
+++ b/sci/ferrimagnetic.wiki
@@ -0,0 +1,4 @@
+= Ferrimagnetic =
+
+A ferrimagnetic mineral is a mineral that is spontaneously magnetic, also known
+as a rare earth magnet.
diff --git a/sci/geology.wiki b/sci/geology.wiki
index fdec9e1..5890444 100644
--- a/sci/geology.wiki
+++ b/sci/geology.wiki
@@ -7,6 +7,8 @@ The study of rocks and the earth's natural processes
 === Iron ===
 
 * [[BIF]]
+* [[Magnetite]]
+* [[Hematite]]
 
 === Copper ===