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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Wolff sent the specimens, labeled as "dumortierite," to the firm of Gebruder Bank in Idar-Oberstein, Germany for identification.
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: quartz, dumortierite, kaolinite and rutile.
Associated minerals are: quartz, microcline, sillimanite, surinamite, musgravite, "garnet," biotite, "apatite," rutile, dumortierite and spinel.
Wolff"; the stones were labeled as possibly iolite or dumortierite. Hermann Bank and Professor Waldemar Berdesinski of the University of Heidelberg identified them as zoisite.