Update for 05-03-22 17:15

sci/Hematite.wiki

@@ -0,0 +1,16 @@
+= Hematite =
+
+Hematite is a common iron ore, with chemical forumla Fe,,2,,O,,3,,. Hematite is
+electrically conductive and is harder than pure iron.
+
+== Identification ==
+
+* Gray, black, steel, silver-gray, brown, reddish brown
+* Metalic luster (in darker color varieties)
+
+== Location ==
+
+* Gray is found near
+  * standing water
+  * mineral hot springs
+* Found in some soil

sci/Magnetite.wiki

@@ -4,3 +4,21 @@ 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 ==
+
+* Black or brownish
+* metalic luster
+* Hardness of 5-6
+* Leaves a black streak
+* magnetic
+
+== Location ==
+
+* Found in sedimentary rocks
+* Found in [[BIF]]s
+* Found in lake and marine sediment
+* Found in beach sand (black sands)
+
+
+== Also see ==
+
+* [[Hematite]]

sci/geology.wiki

@@ -9,6 +9,9 @@ The study of rocks and the earth's natural processes
 * [[BIF]]
 * [[Magnetite]]
 * [[Hematite]]
+* Goethite
+* Limonite
+* Siderite
 
 === Copper ===