To use all functions of this page, please activate cookies in your browser.
my.chemeurope.com
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
DumortieriteDumortierite is a fibrous variably colored aluminium boro-silicate mineral, Al6.5-7BO3(SiO4)3(O,OH)3. 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 8.5 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. Additional recommended knowledgeDumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugene 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. 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 Canada, France, Italy, Madagascar, Namibia, Nevada, Norway, Poland and Sri Lanka. See alsoReferences
Categories: Aluminium minerals | Borate minerals | Nesosilicates | Gemstones |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Dumortierite". A list of authors is available in Wikipedia. |