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Thursday, August 6, 2009

Hematite Fe2O3 Oxides Group

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Physical Features
1. Color- Metallic gray to earthy red.
2. Streak- Bright red.
3. Luster- Metallic.
4. Cleavage-None.
5. Transparency- Opaque.
6. Fracture- Uneven to sudconchoidal.
7. Hardness- 5.5-6.5
8. Forms- Tabular, botryoidal.
9. Crystal system- Hexagonal (rhombohedral).
Hematite is the most important iron oxide in the world. Hematite contains over 70 percent iron. This iron ore is be often found as a covering, or coating, on rocks that are igneous, metamorphic, and those that are sedimentray. When looking for Hematite, look for rocks that hold a reddish, or rust like color to them. It forms as a hydrothermal, or as a secondary mineral by filling in the pocket's and crevice's with it's wonderful metallic luster. Hematite formes are usually tabular, botryoidal, and rhombohedral. Today, the Lake Superior region has the most abundent supplier of Hematite in the U.S.A. Other occurrences can be noted worldwide.

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