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- Q677619 subject Q7210587.
- Q677619 subject Q7213521.
- Q677619 subject Q7215190.
- Q677619 subject Q7318447.
- Q677619 subject Q7318555.
- Q677619 abstract "Dumortierite is a fibrous variably colored aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartz containing abundant dumortierite inclusions.Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugène Dumortier (1803–1873). It typically occurs in high temperature aluminium rich regional metamorphic rocks, those resulting from contact metamorphism and also in boron rich pegmatites. The most extensive investigation on dumortierite was done on samples from the high grade metamorphic Gfohl unit in Austria by Fuchs et al. (2005). It is used in the manufacture of high grade porcelain. It is sometimes mistaken for sodalite and has been used as imitation lapis lazuli.Sources of Dumortierite include Austria, Brazil, Canada, France, Italy, Madagascar, Namibia, Nevada, Norway, Peru, Poland, Russia and Sri Lanka.".
- Q677619 colour Q1088.
- Q677619 thumbnail Dumortierite-ch23a.jpg?width=300.
- Q677619 wikiPageExternalLink 173.
- Q677619 wikiPageExternalLink dumortie.htm.
- Q677619 wikiPageExternalLink AM11_93.pdf.
- Q677619 wikiPageExternalLink AM11_96.pdf.
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- Q677619 wikiPageWikiLink Q7210587.
- Q677619 wikiPageWikiLink Q7213521.
- Q677619 wikiPageWikiLink Q7215190.
- Q677619 wikiPageWikiLink Q7318447.
- Q677619 wikiPageWikiLink Q7318555.
- Q677619 wikiPageWikiLink Q81454.
- Q677619 wikiPageWikiLink Q854.
- Q677619 color "Blue, greenish-blue, violet-blue, pale blue, red".
- Q677619 name "Dumortierite".
- Q677619 type ChemicalSubstance.
- Q677619 type Mineral.
- Q677619 type ChemicalObject.
- Q677619 type Thing.
- Q677619 type Q7946.
- Q677619 comment "Dumortierite is a fibrous variably colored aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4.".
- Q677619 label "Dumortierite".
- Q677619 depiction Dumortierite-ch23a.jpg.
- Q677619 name "Dumortierite".