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mineral hematite.
Talk:Hematite. Jump to navigation Jump to search ... Hematite the pretty mineral is more massive and crystalline. The crystals can form when the mineral is precipitated from liquid. When it forms chemically on iron, that's when you get the red, powdery version. No large crystals form there (only tiny ones).
The mineral Hematite is known to form pseudomorphs over Magnetite. Such pseudomorphs are commonly known as Martite, and their appearance may be very similar to regular Magnetite. However, they differ from Magnetite in that they are only weakly attracted to magnetic fields, and have a reddish-brown streak.
Hematite: Hematite, heavy and relatively hard oxide mineral, ferric oxide (Fe2O3), that constitutes the most important iron ore because of its high iron content (70 percent) and its abundance. Its name is derived from the Greek word for “blood,” in allusion to its red colour. Many of the various forms of
Hematite is composed of 70% iron (chemical symbol Fe, a metallic mineral). 5% of the Earth's crust is composed of Iron. The inner core of the Earth is believed to be a solid iron-nickel alloy (it's also believed that iron-nickel meteorites represent the earliest material - formed at the beginning of the universe).
Magnetite is very easy to identify. It is one of just a few minerals that are attracted to a common magnet. It is a black, opaque, submetallic to metallic mineral with a Mohs hardness between 5 and 6.5. It is often found in the form of isometric crystals. It is the most strongly magnetic mineral ...
Hematite definition is - a reddish-brown to black mineral consisting of ferric oxide, constituting an important iron ore, and occurring in crystals or as earthy red ocher. a reddish-brown to black mineral consisting of ferric oxide, constituting an important iron ore, and occurring in crystals or as earthy red ocher…
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