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Topic: Hematite


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In the News (Wed 19 Jun 19)

  
  Hematite - Wikipedia, the free encyclopedia
Hematite (AE) or haematite (BE) is the mineral form of Iron(III) oxide, (Fe), one of several iron oxides.
Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and as corundum.
Clay-sized hematite crystals can also occur as a secondary mineral formed by weathering processes in soil, and along with other iron oxides or oxyhydroxides such as goethite, is responsible for the red color of many tropical, ancient, or otherwise highly weathered soils.
en.wikipedia.org /wiki/Hematite   (595 words)

  
 Opportunity Puts Hematite on Hold :: Astrobiology Magazine ::
It depicts the concentration of hematite present in a small region of the floor of the crater that surrounds the rover.
The map shows that the hematite concentration is greatest in the top left of the image, and decreases toward both the bottom and the right.
By studying the distribution of hematite and determining what other minerals are found along with it, MER scientists hope to understand the role that water played in the history of Meridiani Planum.
www.astrobio.net /news/article822.html   (688 words)

  
 Hematite, rock, crystal, mineral, gem stone, birth stones - mineralgallery
Hematite is an important ore of iron and it's blood red color (in the powdered form) lends itself well in use as a pigment.
Ancient superstition held that large deposits of hematite formed from battles that were fought and the subsequent blood that flowed into the ground.
Crystals of hematite are considered rare and are sought after by collectors as are fine Kidney Ore specimens.
www.mineralgallery.co.za /hematite.htm   (481 words)

  
 Hematite
Hematite is said to be closely tied to the blood, probably due to its iron content.
Hematite is a good stone for those born during the Moon of Renewal - (22 Dec- 19 Jan.) It's grounding and soothing energies can help one to relax and unwind both physically and mentally.
Hematite is a good choice for those born under the zodiac sign of Virgo.
www.mysticmountainjewelry.com /hematite.htm   (268 words)

  
 Hematite | Natural Pigments
Hematite is a ferric oxide native earth and the principle coloring agent in red ochre, such as Indian Red, Terra Pozzuoli, Venetian Red, etc. These pigments are basically hematite associated with varying proportions of mineral impurities such as clay, chalk and silica.
Hematite is an important ore of iron and its blood red color in the powdered form lends itself well as a pigment.
Hematite of excellent quality is found in the deposits of Krivoy Rog and Kerch, Russia, which is where we obtain our mineral for manufacture into the pigment Hematite.
www.naturalpigments.com /detail.asp?PRODUCT_ID=450-31S   (569 words)

  
 GemRocks: Hematite
This granular material is described as typically bluish gray, having a dark brown streak, and magnetic, and that polished surfaces of it tend to be slightly pitted.
The redness of hematite powder was an early recognized characteristic and, in ancient times, this property led to its being fashioned into amulets used to ward off or stop bleeding.
Hematite (though not as a gemrock) is the state mineral of Alabama.
www.cst.cmich.edu /users/dietr1rv/hematite.htm   (1579 words)

  
 Mars Exploration Rover Mission: Features
What makes it significant is that it is made of specular hematite, which for Mars scientists like Crisp may prove to be more special than diamonds.
Hematite is made up of iron and oxygen-a type of iron oxide.
To find out what helped produce the hematite - water or volcanic activity - they'll be examining both the form of the hematite and the company it is keeping.
marsrovers.jpl.nasa.gov /spotlight/hematite01.html   (592 words)

  
 Bob's Rock Shop: WSU Hematite   (Site not responding. Last check: 2007-10-16)
Hematite is also found in hydrothermal veins and in the gossans or leached cappings of base metal deposits.
Hematite is rather variable in appearance and sometimes occurs as fl rhombohedral crystals arranged in rosette form (iron roses).
The presence of hematite is often responsible for coloring or staining surrounding material red to reddish brown.
www.rockhounds.com /rockshop/hemati1.html   (124 words)

  
 Official Alabama Mineral   (Site not responding. Last check: 2007-10-16)
Hematite, an oxide of iron (Fe), is also known as "red iron ore" and in 1967 was designated as the State Mineral by the Alabama Legislature.
Hematite was mined for many years in the Valley and Ridge area of central and northeastern Alabama.
The mining of hematite was once the state's most developed nonfuel mineral industry, and the occurrence of hematite with nearby deposits of coal (a fossil fuel) and limestone (used as flux) led to the development of Birmingham as an industrial center.
www.archives.state.al.us /emblems/st_miner.html   (245 words)

  
 Rocks and Minerals Tour: Envi Sci Dept, UVA
Hematite is a mineral that has a strong reddish color to it due to the presence of iron in its composition.
Hematite has a tabular or rhombohedral habit and also exhibits twinning in the form of penetration twins.
A variety of hematite, specular hematite, occurs sporadically along the case of the Blue Ridge, especially in the Buchanan-Roanoke-Thaxton area.
www.evsc.virginia.edu /tours/rockmin/hematite.shtml   (313 words)

  
 Encyclopedia of Gemstones - Hematite
Hematite is heavy and relatively hard oxide mineral, that constitutes the most important iron ore because of its high iron content (70 percent) and its abundance.
Red ochre is used as a pigment in paints and crayons, a purified form, rouge, is used to polish plate glass.
Nowdays hematite may also be used as a polishing powder and as a paint pigment.
www.all-that-gifts.com /se/hematite.html   (321 words)

  
 PSRD: Gray hematite deposit in Terra Meridiani, Mars
For this reason, the announcement in 2000 of the discovery of crystalline gray hematite near the Martian equator was, in a word, a watershed for planetary geologists and astrobiologists interested in unraveling the history of water and climate on Mars.
Detection of the hematite in Terra Meridiani is one of the key discoveries of the Thermal Emission Spectrometer (TES) instrument on the Mars Global Surveyor (MGS) mission.
rystalline gray hematite (the coarse-grained form of the iron oxide we call rust when it's powdery and red) was found by scientists analyzing remote sensing data gathered by the Thermal Emission Spectrometer (TES) instrument during the early (1997-1998 aerobraking) phase of the MGS mission.
www.psrd.hawaii.edu /Mar03/Meridiani.html   (2150 words)

  
 Mineral Information Institute - IRON ORE
The principle ores of iron are Hematite, (70% iron) and Magnetite, (72 % iron).
Hematite is iron oxide (Fe The amount of hematite needed in any deposit to make it profitable to mine must be in the tens of millions of tons.
Hematite deposits are mostly sedimentary in origin, such as the banded iron formations (BIFs).
www.mii.org /Minerals/photoiron.html   (1070 words)

  
 SPACE.com -- 'Blueberries' Reveal Only Part of the Mars Water Story
Spherules found at Meridiani Planum are composed largely of hematite mineral - another piece of the puzzle that points to a watery past at this location.
Knoll, however, said that standing water was not a prerequisite for the hematite finding, citing that similar processes have taken place here on Earth, such as in Utah where sandstone outcrops were gradually saturated by groundwater as the water table rose over time.
Hematite is a mineral that typically, though not always, forms in water.
www.space.com /scienceastronomy/hematite_blueberries_040319.html   (1038 words)

  
 Hematite
Hematite is a mineral that can appear red, reddish-brown, steel gray or fl.
Hematite can always be identified by its red streak regardless of the colour of the specimen.
Gray hematite was detected on Mars by the infrared spectrometer on NASA's Mars Global Surveyor (MGS) spacecraft in 1998.
www.suite101.com /article.cfm/science_surfing/107491   (335 words)

  
 Hematite   (Site not responding. Last check: 2007-10-16)
Hematite is the most important source of iron ore in the world.
Hematite has a red or fl color but the streak is always red.
Hematite is mined in the Lake Superior and Appalachian mountain regions of the United States.
volcano.und.nodak.edu /vwdocs/vwlessons/lessons/Slideshow/Show2/Show2-5.html   (172 words)

  
 Hematite
These hematite chips resemble our pyrite chips, the basic difference is the color, shinny fl/grey in color.
These are magnetic hematite beads in an 8mm round bead.
These are very well made smooth flat teardrops in hematite, measuring about 10mm tall by 8mm wide by 5mm thick and with about a.5mm hole.
www.jewelweaver.com /MM003.ASP?pageno=78   (272 words)

  
 Magnetic Hematite Bracelet
If you see a magnetic hematite bracelet that you would like in a custom size, please drop me an e-mail.
All my magnetic hematite bracelets are made with genuine magnetic hematite and gemstone beads.
Please be advised that all measurements of magnetic bracelet lengths are approximate.
www.the-gem-in-i.com /Magnetic-Hematite-Bracelets2.html   (258 words)

  
 The mineral hematite
Hematite is one of the most common minerals.
Hematite was largely used in the past as a red and brown pigment, although nowadays cheaper sources have been substituted.
Hematite (Rainbow Hematite) has also been found at those localities, as well as in Rio Marina, on the island of Elba, Italy.
www.minerals.net /mineral/oxides/hematite/hematite.htm   (357 words)

  
 Images of Nature
Hematite is an oxide of iron, Fe2O3, which is used as an ore of iron.
Hematite can be formed by weathering of other minerals such as siderite limonite or magnetite.
In the United States hematite can be found in the Lake Superior region as mentioned where the deposits can reach thicknesses of 1000 ft. Hematite can be found in Michigan, Wisconsin, Minnesota, New York, Pennsylvania, Alabama, New Jersey, Missouri, Colorado and Wyoming.
ion.eas.asu.edu /min13_spechemtite/min13_thumb.htm   (174 words)

  
 Spaceflight Now | Destination Mars | Opportunity finds what it went to Mars looking for
A laboratory spectrum of hematite, shown as the red curve, matches with the Mini-TES spectrum of the dark soil near the lander, shown as the yellow curve.
The crater's gray soil granules have the hematite.
The airbags actually altered the surface enough so that it appears the hematite is carried in the coarse material and the fine red material underneath it we do not see this hematite signature.
www.spaceflightnow.com /mars/mera/040201hematite.html   (1509 words)

  
 Hematite
In these sedimentary deposits, hematite is thought to have precipitated from lakes or seas by organic and/or chemical processes.
The hematite often occurs with intermixed layers of quartz or chert.
The largest amounts of hematite are found in sedimentary rocks, often as thin layers between layers of quartz or chert.
www.windows.ucar.edu /earth/geology/min_hematite.backup_MetaRefresh   (347 words)

  
 HEMATITE (Iron Oxide)
Hematite Rose is a circular arrangment of bladed crystals giving the appearance of the flower of a rose.
Oolitic Hematite is a sedimentary formation that has a reddish brown color and an earthy luster and is composed of small rounded grains.
Specularite is a micaceous or flaky stone that is sparkling silver gray and sometimes used as an ornamental stone.
mineral.galleries.com /minerals/oxides/hematite/hematite.htm   (352 words)

  
 Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Hematite
Due to its profuseness and high iron content, hematite is considered one of the most important sources of iron ore. The mineral occurs, however, in a variety of forms, some of which are more commercially valuable than others.
The type of hematite that occurs in large sedimentary deposits, such as the ones found near Lake Superior and Quebec in North America, is the most notable for its metal ore. Interestingly, according to ancient folklore, such sizable deposits of hematite were formed from the bloodshed of fierce battles seeping into the ground.
Indeed, a form of hematite usually referred to as red ochre occurs in a fine-grained powder, which is often used to impart a reddish hue to paints.
www.olympusmicro.com /galleries/polarizedlight/pages/hematitesmall.html   (217 words)

  
 Handmade Hematite bead necklaces
Hematite is made from Iron Stone and is found in most parts of the world.
Hematite is also said to be good for the memory.
Hematite 3 cluster Necklace graduated from 8mm to 2mm with pearl beads inserted
www.storesonline.com /site/1515204/page/609039   (336 words)

  
 Hematite
The name hematite comes from the Greek word haimatos or "blood" because of its red streak.
Hematite is the most important ore of iron and is found in deposits all over the world.
Though a common mineral, some of the primary deposits of hematite have been mined out leading to iron production from the lower grade taconite.
www.museums.udel.edu /mineral/mineral_site/collection/alphabetical/H/hematite.html   (71 words)

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