General Staurolite Information. Fe 2+1.4 Li 0.1 Mg 0.1 Al 8.6 Si 3.9 Al 0.1 O 21.7 (OH) 2.3. Metamorphosed aluminous sedimentary rocks. Common world wide occurrences. Link to MinDat Location Data. From the Greek, stauros - "cross" and lithos - "stone" in allusion to the common cross shaped twins of the crystals.
The formation is divided into three informal members. The first is composed of staurolite gneiss and schist, from 60 meters (200 feet) to 150 meters (490 feet) thick, which contains porphyroblasts of garnet and staurolite up to 4 cm long. Most of the staurolite from these beds is twinned, and the large crystals are prized by mineral collectors.Where the schist is heavily …
metamorphic rock - metamorphic rock - Metamorphic reactions: A very simple mineralogical system and its response to changing pressure and temperature provide a good illustration of what occurs in metamorphism. An uncomplicated sediment at Earth's surface, a mixture of the clay mineral kaolinite [Al4Si4O10(OH)8] and the mineral quartz (SiO2), provides a good example.
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Staurolite is a collector's mineral, with the intergrown twin s and crosses especially desirable. Small twinned crystals can be worn as amulets and charms, especially by Christians. NOTEWORTHY LOCALITIES. A classic Staurolite locality is Pizzo Forno, Ticino, Switzerland, where elongated crystals were found in matrix associated with Kyanite .
Torrington (Wolcottville) ⓘ Rossi Road. [ Staurolite] Rocks & Minerals (1995) 70:396-409. Washington. ⓘ Kyanite prospect (Judds Bridge locality) [ Staurolite] Januzzi, Ronald E. and David Seaman. (1976): Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World.
Anhedral inclusions up to 250 micro-m in pyrope megablasts. Ultra-high pressure mineral. IMA Status: Approved IMA 2003 (Dana #Added) Locality: Coesite-bearing Dora-Maira massif, Italian Western Alps. Link to MinDat Location Data. Name Origin: Named as the magnesium-dominant analog of staurolite. Synonym: IMA1992-035 : Magnesiostaurolite Image
Staurolite definition: a brown glassy mineral consisting of iron aluminium silicate in the form of prismatic... | Meaning, pronunciation, translations and examples
Staurolite is a hard mineral (Mohs hardness of 7 to 7.5, like quartz) and is resistant to weathering, so loose crystals and twins can often be found in sedimentary deposits of rivers. Staurolite ...
Name: Staurolite RRUFF ID: R050079 Ideal Chemistry: Fe 2+ 2 Al 9 Si 4 O 23 (OH) Locality: Keivy, Kola Peninsula, Russia Source: Rock Currier Owner: RRUFF Description: Brown cruciform twins Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis Mineral Group: [ Staurolite (2)] Quick search: [ All Staurolite samples (2)]
Zincostaurolite. Comments: BSE image of zincostaurolite (St) grain replaced by Na-Ca-Li mica (Mi), gahnite Gah), Fe-Mn hydroxide (small rounded bright grains) and diaspore (darkest grains in upper left corner).Matrix consists of calcite (Cal). Location: Diaspore-bearing metabauxite from East Samos, Agean Sea, Greece.(AmMin v88:789). Scale: See Image.
Medium grade metapelites of the Torrox unit (Betic-Rif Belt, S Spain) contain mineral assemblages consisting of garnet (Grt), staurolite (St), cordierite (Crd), biotite, kyanite, sillimanite, andalusite, muscovite (Ms) and quartz (Qtz) and record complex reaction processes of cordierite growth through garnet and staurolite decomposition. The reaction textures, the …
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Barbara Dutrow (born 1956) is an American geologist who is the Adolphe G. Gueymard Professor of Geology at Louisiana State University.Dutrow wrote the textbook Manual of Mineral Science.She was elected President of the Geological Society of America in 2021.
Staurolite is a hard, reddish-brown mineral that is commonly found in metamorphic rocks such as schist and gneiss. It has an interesting habit of occurring as twinned, six-sided crystals that look like crosses. These staurolite formations are frequently known as "fairy stones". Staurolite is the official state mineral of Georgia.
Staurolite is a mineral of metamorphic rocks, such as schists and gneiss. Inclusions Crystals (garnet, quartz), may have surface cavities. Cut staurolites, Minas Gerais, Brazil. Gem cutting by Afonso Marques. Photo by Eurico Zimbres. Licensed under CC …
At low grade, the stable mineral assemblage is Garnet + Chlorite + Biotite + Muscovite + Quartz. As temperature and pressure are raised, this assemblage becomes unstable and the tie line connecting Garnet and Chlorite is replaced by one connecting Staurolite + Biotite. The reaction that occurred is the univariant reaction:
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Table 1 Mineral Chemical Groups and Formulae for Rock Forming Minerals. Group Mineral Name Mineral Formula Staurolite Fe 2 Al 9 Si 4 O 22 OH 2 Carbonates Calcite, Aragonite CaCO 3 anion CO 3 Dolomite CaMgCO 3 2 2-Azurite Cu 3 CO 3 2 OH 2 Malachite Cu 2 CO 3 OH 2 Sulfates Anhydrite CaSO 4 anion SO.
The name of this mineral compound is staurolite, and like many other minerals, the staurolite formed in regular crystals. Single crystals are hexagonal or six-sided, and singles often intersect at right angles to form the Roman or Maltese shape. In other instances, the singles intersect at forty-five-degree angles to form St. Andrews crosses. ...
The U.S. Geological Survey (USGS) has responded to the new situation through cooperative mineral resource investigations with a number of countries in Latin America. These activities are now being coordinated by the USGS's Center for Inter-American Mineral Resource Investigations (CIMRI), recently established in Tucson, Arizona.
the Late Paleozoic garnet-staurolite-muscovite schists in the central Qiangtang block, Tibet. Provenance analyses suggest that the protoliths of garnet-staurolite-muscovite schists have the Northern Qiangtang-affinity and were deposited in an active continental margin setting. Mineral inclusion data show that the early metamorphic stage (M
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The Georgia state mineral, the staurolite crystal, has been found in large quantities for generations in northern Georgia. The staurolite crystal is often referred to as a "fairy stone" or a "fairy cross" by local residents due to its easily recognizable cross …
138 entries of Staurolite Mineral Gallery. Almandine Garnet and Staurolite from Green's Farm, 750 m. ESE of Roxbury Falls, Roxbury, New Haven County, Connecticut. Almandine Garnet and Staurolite from Pond Hill, near Pearl Lake, Lisbon, Grafton County, New Hampshire. Almandine Garnet with Staurolite from Green's Farm, 750 m.
Qualitative and quantitative information about metamorphic reaction history and PT paths may be obtained from mineral inclusions in garnet by comparing the mineralogy, distribution, and compositions of paragenetically-related inclusions with minerals in the groundmass assemblage. Using the algebraic technique of singular value decomposition (SVD), we document mass …
Mining Companies Statistics Users Mineral Museums Mineral Shows & Events The Mindat Directory Device Settings The Mineral Quiz. ... Gambo Falls Staurolite locality, Gorham, Cumberland Co., Maine, USA. Almandine, Staurolite. Mama mica mines, Mama River Basin, Buryatia, Russia. Staurolite, Almandine.
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Staurolite's hardness on Mohs' scale is 7–7.5, and the density is 3,650–3,770 kg/m3. The color may be dark red, brown, brown-black, or yellow-brown, and the luster is vitreous. Staurolite is an accessory mineral in schists (together with kyanite, garnet, and andalusite) and gneisses. Its rare transparent crystals are sometimes used as gems.
converted to leucoxene, staurolite, and locally abundant spinel. The M.5 concentrate contains abundant garnet in the Inner Piedmont, dark ferromagnesian minerals in the Charlotte Belt, and ilmenite in most provinces. Mineral proportions in each magnetic fraction were estimated using a binocular microscope.
REFERENCES for Staurolite; American Mineralogist Crystal Structure Database Record: [view record] Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of …
Mineral rich sands Wogen has a long and significant history in mineral sands be it Rutile, Zircon, Ilmenite, Staurolite or Ti Slag. These minerals have a wide application in the pigments industry as well as ceramics, glazes and in chemicals, metal production and …
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Staurolite is a hard mineral (Mohs hardness of 7 to 7.5, like quartz) and is resistant to weathering, so loose crystals and twins can often be found in sedimentary deposits of rivers. Staurolite ...
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