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lapis lazuli(lăp`ĭs lăz`o͝olē), gem, deep blue, violet, or greenish blue in color and usually flecked with yellow iron pyrites. It is composed of lazurite, a complex sodium aluminum silicate, mixed with other minerals, and is usually found in masses, rather than in crystals, in metamorphosed limestones. Sources of supply are Afghanistan, Chile, Siberia, upper Myanmar, California, and Colorado. It was formerly made into vases and bowls and has been used from ancient times for beads and small ornaments. It was also extensively used in mosaics and was the "sapphire" of the ancients.
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A decorative variety of calcite, stained a deep blue by trace minerals; used as a stone veneer, and in powdered form as the original ultramarine pigment.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
lapis lazuli[¦lap·is ′laz·ə·lē]
An azure-blue, violet-blue, or greenish-blue, translucent to opaque crystalline rock used as a semiprecious stone; composed chiefly of lazurite and calcite with some haüyne, sodalite, and other minerals. Also known as lazuli.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A rich blue semiprecious stone; either used decoratively or ground and powdered for use as an ultramarine pigment.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
emblem of sexual purity. [Gem Symbolism: Kunz, 370]
Allusions—Cultural, Literary, Biblical, and Historical: A Thematic Dictionary. Copyright 2008 The Gale Group, Inc. All rights reserved.
lapis lazuli, lazuli
1. a brilliant blue variety of the mineral lazurite, used as a gemstone
2. the deep blue colour of lapis lazuli
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005