dumortierite


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dumortierite

[dü·mōr′tir‚īt]
(mineralogy)
Al8BSi3O19(OH) A pink, green, blue, or violet mineral that crystallizes in the orthorhombic system but commonly occurs in parallel or radiating fibrous aggregates; mined for the manufacture of high-grade porcelain.
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References in periodicals archive ?
Schneider and Seeger (1992b) report bright deep blue dumortierite from a pegmatite on the farm Etemba 135, close to the northern boundary of the Erongo Mountains.
Associated minerals are: alkali-feldspar, plagioclase, quartz, sekaninaite, andalusite, topaz, garnet, biotite, muscovite, dumortierite, schorl, zircon, apatite, monazite, ilmenite, pyrite, cordierite, sericite and chlorite.
Associated minerals are: quartz, dumortierite, kaolinite and rutile.