Amazonite (sometimes called "Amazon stone") is a green variety of
The name is taken from that of the
Amazon River, from which certain green stones were formerly obtained, but it is doubtful whether green feldsparoccurs in the Amazon area.
Amazonite is a mineral of limited occurrence. Formerly it was obtained almost exclusively from the area of
Miassin the Ilmen mountains, 50 miles southwest of Chelyabinsk, Russia, where it occurs in granitic rocks. More recently, high-quality crystals have been obtained from Pike's Peak, Colorado, where it is found associated with smoky quartz, orthoclase, and albitein a coarse graniteor pegmatite. Crystal Peak, Teller County, Coloradois a well-known locality for crystals of amazonite. Some other localities in the United Statesyield amazonite, and it is also found in pegmatitein Madagascar.
Because of its bright
greencolour when polished, amazonite is sometimes cut and used as a gemstone, although it is easily fractured.
For many years, the source of amazonite's color was a mystery. Naturally, many people assumed the color was due to copper because
coppercompounds often have blue and green colors. More recent studies suggest that the blue-green color results from small quantities of leadand water in the feldspar. (Hoffmeister and Rossman, 1985)
List of minerals
Wikimedia Foundation. 2010.
Look at other dictionaries:
Amazonite — Catégorie IX : silicates Amazonite Colorado Etat Unis … Wikipédia en Français
amazonite — ● amazonite nom féminin Variété verte de microcline. amazonite [amazɔnit; amazonit] n. f. ÉTYM. Av. 1898; de Amazone, fleuve d Amérique du Sud (→ 2. Amazonien), et ite. ❖ ♦ Minér. Pierre fine et d ornementation, constituée par du feldspath … Encyclopédie Universelle
Amazonite — Am a*zon*ite, Amazon stone Am a*zon stone , n. [Named from the river Amazon.] (Min.) A variety of feldspar, having a verdigris green color. [1913 Webster] … The Collaborative International Dictionary of English
amazonite — s. f. [Mineralogia] Variedade de feldspato verde. ♦ Grafia no Brasil: amazonita … Dicionário da Língua Portuguesa
amazonite — [am′ə zən īt΄] n. [after the AMAZON2 River] a green microcline, often cut and polished as a gem: also Amazon stone … English World dictionary
amazonite — amazonitas statusas T sritis chemija apibrėžtis Žalioji mikroklino atmaina, mineralas. formulė K[AlSi₃O₈] atitikmenys: angl. amazonite rus. амазонит … Chemijos terminų aiškinamasis žodynas
amazonite — noun Etymology: Amazon River Date: circa 1879 an apple green or bluish green variety of microcline … New Collegiate Dictionary
amazonite — /am euh zeuh nuyt /, n. Mineral. a green feldspar, a variety of microcline, used as an ornamental material. Also called Amazon stone. [1595 1605; AMAZON (river) + ITE1] * * * … Universalium
amazonite — noun a gem variety of microcline feldspar, varying from bright verdigris green to a bluish green … Wiktionary
amazonite — am·a·zon·ite … English syllables