barbertonite

barbertonite

[′bär·bər·tə‚nīt]
(mineralogy)
Mg6Cr2(OH)16CO3·4H2O A lilac to rose pink, hexagonal mineral consisting of a hydrated carbonate-hydroxide of magnesium and chromium; occurs in massive form or in masses of fibers or plates.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.