turquoise


Also found in: Dictionary, Thesaurus, Wikipedia.

turquoise,

hydrous phosphate of aluminum and copper, Al2(OH)3PO4·H2O+Cu, used as a gem. It occurs rarely in crystal form, but is usually cryptocrystalline. Turquoise is opaque and has a waxy luster; the color varies from greenish gray to sky-blue. The sky-blue varieties are the most valued as gems, but because of their porosity they easily absorb dirt and grease and change in color to an unattractive green. Exposure to heat or sunlight is also injurious to the color of the turquoise. The finest specimens come from Iran; other sources are the Sinai peninsula and the SW United States, especially New Mexico, Nevada, Arizona, and Colorado. Turquoise matrix is a rock including fragments of turquoise, cut as a gem stone. Variscite, the hydrated phosphate of aluminum, is sometimes used as a substitute for turquoise. It occurs in crystals of the orthorhombic system and in massive form; minable deposits are found in Utah.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Turquoise

 

a mineral of the chemical composition CuAl6[P04]4(OH)8·4H2O. It crystallizes in a tricline system. It usually forms compact, cryptocrystalline masses, kidney-shaped aggregates, incrustations, thin veins, and so on. Its hardness on the mineralogical scale is 5–6; its density is 2,600–2,800 kg/m3. The luster is dull and waxy. It is distinguished by a beautiful sky-blue or greenish-blue color. The formation of turquoise is associated with the weathering of feldspar rocks rich in Al2O3 and phosphates (apatite, phosphorite, and others) under the influence of surface waters that contain copper ions. Turquoise is sometimes formed by the replacement of parts of the skeleton of fossil animals (so-called odontolite). Owing to its beautiful color (particularly in polished form), it is widely used in art and jewelry items as a semiprecious stone. The largest deposit of turquoise is at Nishapur in Iran. In the USSR, turquoise is found in Middle Asia and Kazakhstan.

G. P. BARSANOV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

What does it mean when you dream about turquoise?

A precious stone of blue and green mined by Native Americans throughout the southwestern United States, the turquoise has spiritual significance. It is the sacred stone of the Navajo associated with natural forces and healing.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.

turquoise

[′tər‚kwȯiz]
(mineralogy)
CuAl6(PO4)4(OH)8·4H2O A semitranslucent sky-blue, bluish-green, apple-green, or greenish-gray mineral that crystallizes in the triclinic system and occurs in veinlets or as crusts of massive, concretionary, and stalactite shapes; an important gem mineral. Also known as calaite; Turkey stone.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

turquoise

December. [Am. Gem Symbolism: Kunz, 319–320]

turquoise

seeing turquoise after a new moon brings wealth. [Gem Symbolism: Kunz, 345]
See: Wealth
Allusions—Cultural, Literary, Biblical, and Historical: A Thematic Dictionary. Copyright 2008 The Gale Group, Inc. All rights reserved.

turquoise

1. a greenish-blue fine-grained secondary mineral consisting of hydrated copper aluminium phosphate. It occurs in igneous rocks rich in aluminium and is used as a gemstone. Formula: CuAl6(PO4)4(OH)8.4H2O
2. the colour of turquoise
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Turquoise Hill announces second quarter 2019 production results and provides underground development update
Players can get the gray, yellow and turquoise versions for $199.99.
The conference call will also be simultaneously webcast on Turquoise Hill's website at www.turquoisehill.com.
Turquoise Asset Management has established an outstanding reputation and robust performance track record in the Iranian equities market.
The government of Mongolia owns 34 percent of Oyu Tolgoi with the remainder held by Turquoise Hill Resources, which in turn is 51% owned by Rio Tinto.
Poet Lauren Camp takes us for a deep dive into the landscape and culture of New Mexico and its wealth of personality in her new book, Turquoise Door.
$1,968 Ted Charveze (Isleta, 20th century) 14K Gold, Diamond, and Turquoise Necklace, gold feather and rope chain with circular medallion; gold medallion set with a turquoise cross and 22 full cut diamonds, approximately .55 carat total weight; hallmarked, necklace 60.3 dwt., length 25 in, length of pendant 3.5 in., 20th century.
In same manner, make 120 turquoise /teal triangle-squares, 60 turquoise/lime triangle-squares, and 120 purple/lime triangle-squares (Diagram I-B).
London, United Kingdom, March 01, 2018 --(PR.com)-- The Turquoise Collection, specialist tour operator to what it considers are some of the most beautiful parts of Europe, launch Bodrum, Turkey as the latest destination in its fast growing portfolio of holiday villas and hotels.
Centered on bringing to the forefront authentic Turkish cuisine and hospitality fueled with passion and dedication, Rixos Premium Dubai's Turquoise Restaurant has been designed to reach a broader clientele.
Choose 9 turquoise prints and number them according to value from lightest (#1) to darkest (#9); note that the differences between some fabrics in the quilt are very subtle, such as with turquoise prints #3 and #4, and turquoise #6 and #7; for the sake of clarity, we have enhanced the differences in the diagrams.