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A clear, blue or blue-violet cordierite often used as a gemstone. Also called water sapphire.

[Greek ion, violet; see iodine + -lite (on the model of German Iolith : Greek ion + -lith, -lite, -lith).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) another name for cordierite
[C19: from Greek ion a violet + -lite]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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This silver Tree of Life pendant is studded with 13 semi-precious gemstones - 2 each of purple amethyst, lavender tanzanite and navy iolite plus 7 white topaz gems.
Cozzette Crystal Eyeshadow in Iolite: There's an Instagram filter that places colourful sparkles over the user's eyelids.
And, although not a brand new trend, using the diamond as an embellishment to a statement coloured stone is still popular: "Our clients are showing a desire to see coloured gemstones from top quality rubies and sapphires through to more unusual stones, tourmaline, kunzite, iolite and hessonite.