Hematite is opaque and is a common mineral, iron oxide (Fe2 3). It's Luster can be metallic, sub-metallic, dull, and earthy.  It's steel-grey to black in crystals and massively crystalline ores, dull to bright "rust-red" in earthy, compact, fine-grained material. It dates back to the Mesozoic Period. When streak tested they are all is a rust-red. 
 
Named in 1535-45; < Latin haematites bloodstone < Greek haimati´tes (lithós) blood-like (stone).
 
**The 'hematite' used in jewelry, often magnetized, is an artificially created material.
 
Hematite is also known as Alaska Black Diamond, Anhydroferrite, Haematite, Hematitogelite, Hematogelite (of Tucan), Iron Glance, Red Hematite, Red Iron Ore, Red Oxide of Iron, Ruddle and Sanguine.
 
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* Photos show all sides.
* Sizes, shapes and colors my vary due to being a natural stone, being hand-carved and/or difference in computer monitors.