 | | Report (issue) | | No. 14: Topaz Perfect Cleavage ISBN 978-0-9790998-9-2 Publisher Lithographie, LLC Denver, Colorado...United States of America Photo Credits Cover: Topaz, 3.5 cm tall Capao Mine, Ouro Preto, Minas Gerais...Sigerman collection Robert Weldon photo Above: Topaz, 5.5 cm tall El Chalten, Santa Cruz, Argentina Scott...brooch/pendant is set with topaz from three different localities. Two Brazilian "Imperial" topaz gems make up the...the wings, totaling 19.59 carats, are light blue topaz. The wing tips are set with melee diamonds. The |  | | Journal (article/letter/editorial) | | TOPAZ A • MINERALOGICAL • REVIEW Downloaded by [New York University] at 21:04 11 May 2015 Coveted...specimens from the National Museum of Natural History TOPAZ IS THE STATE GEM of Texas and Utah; however, it...the "big three" (emerald, sapphire, and ruby), topaz is nevertheless regarded as an important and prized...attributes is that, unlike many other gem minerals, topaz may occur in crystals large enough to cut giant...giant gemstones. Gems such as the Champagne Topaz (36,853 carats), the American Golden (22,875 carats), and |  | | Book | | A. Jobbins Butterworth-Heinemann Gem Books Topaz m(JTTERWORTH EINEMANN Butterworth-Heinemann Ltd...Library Cataloguing in Publication Data Hoover, D. B. Topaz. - (Butterworth-Heinemann Gem Books Series) I. Title...Profile xii 1 Topaz - Historical perspectives 1 Introduction 1 Etymology of topaz 1 Topaz in ancient times...times 3 Topaz in Roman times 8 The Dark Ages 12 The Middle Age~ - topaz changes colour The beginning of...of empiricism 15 13 2 Large and important topaz gems and crystals 20 Introduction 20 Giant uncut crystals |  | | Journal (issue) | | TOPAZ, I J.INERALOGICAL RECORD JANUARY-FEBRUARY 1995 • VOLUME 26 NUMBER 1 • $10 Wayne & Dona Leicht......................... 5 by M. A. Menzies Pink topaz from the Thomas Range, Juab County, U ta h .......Lichte & P. H. Briggs FM-TGMS-MSA Symposium on topaz...................................................Columns Notes from the editor by W. E. Wilson TOPAZ, COVER: TOPAZ crystals to 4 cm, on matrix, from Ghundao...Wholesale - Austria Eurasia Stone Corp. - Holland / Russia Excalibur-Cureton Co. Falco Baatz Mineralien-Fossilien-Germany |  | | Journal (issue) | | Socorro, NM Michael leybov, Moscow State University, Russia Mark Mauthner, Graz, Au5tria Peter K. M. Megaw...86 Chips from the Quarry Connoisseur's Choice: Topaz from Granite Pegmatites, Limoeiro Mine, Virgem da...99 Coming Events Topaz, p. 36 Signature specimen, p. 86 ABOUT THE COVER: Topaz with lepidolite, a/bite...Heliodor, 5.5 x 14.2 cm, Minas Gerais, Brazil; B: Topaz, 8 x 10.5 cm, Minas Gerais, Brazil; C: Aquamarine...Ukraine • Roy Bassoo - Trace Elements in Texas Topaz and Their Petrogenetic Significance • Calvin Mako |  | | Book | | anonymous donors. Introduction PAGE T N 0 C Topaz 8 PAGE Tracing the Story of Gems PAGE 80 Tourmaline...59-carat heart-shaped 1norganite, and the 596-pound topaz crystal. In 1951, upon the death of Gertrude Hickman...products. 22 Myriad colored stones, including topaz, amethyst, aquamarine, morganite, chrysoberyl, peridot...MONOCLINIC-ORTHOCLASE (FELDSPAR) ORTHORHOMl3IC-TOPAZ TRICLINIC-AMBLYGONITE The Crystal Syrnmetry Systems:...critical for the beauty of diamond, aquamarine, and topaz, while inclusions account for the presence of a |  | | Book (edition) | | Diamond II Ruby and Sapphire Beryl Chrysoberyl Spinel Topaz Tourmaline The Garnets Feldspar Group Zircon Peridot...citrine and amethyst, which are now produced in Russia and Japan on a commercial scale. Alteration in...(Figure 1.8a) lined with such crystals as beryl and topaz, or they may coalesce into pools or sheets and cool...from the Mourne Mountains, Northern Ireland. A topaz with good crystal form projects into a cavity bordered...crystals are opaque some gem-quality aquamarine and topaz crystals can weigh many kilograms. In geological |  | | Book | | aggregates comc from Mednorudnyansk, Ural mountains. Russia; crystals up to 30 mm ( : Vie in) were found Silver...Berezovsk. Ural mountains and in the Lena River basin, Siberia. Russia. Fine scales and larger nuggets from...(176 lb) are known from Ozernaya Ml., Siberia, Russia. Origin and occurrence: Platinum occurs in magmatic...weighing up to 11.5 kg (25 lb 5 oz) found in the Tura River basin near Turiinsk, Ural Mountains. Primary platinum...the vicinity of Nizhniy Tagil, Ural Mountains, Russia; from the Onvcrwacht mine, Bushveld, South Africa |  | | Book | | aggregates come fron1 Mednorudnyansk, Ural mountains, Russia; crystals up to 30 mm ('3/i6in) were found Silver...Berezovsk, Ural mountains and in the Lena River basin, Siberia, Russia. Fine scales and larger nuggets fron1...kg (176 lb) are known from Ozemaya Mt., Siberia, Russia. Origin and occurrence: Platinum occurs in 1nagmatic...weighing up to I l.5 kg (25 lb 5 oz) found in the Tora River basin near Turiinsk, Ural Mountains. Primary platinum...the vicinity of Nizhn iy Tagil, Ural Mountains, Russia; from the Onveiwacht mine, Bushvekl, South Africa |  | | Book | | crystals to grow in later stages. Pegmatites, rich in topaz, tourmaline and feldspar varieties, are often found...rock crystal • garnet in corundum • hematite in topaz and euclase • • • • • mica: biotite, phlogopite...corundum, diamond and emerald • quartz in aquamarine, topaz and emerald • rutile in corundum, quartz and andalusite...have six rays. Minerals with cleavages such as topaz or moonstone may develop internal cleavages (splitting... Formation and occurrence of gemstones 16 Topaz Topaz, formed hydrothermally, shows characteristic | | | Book | | crystals to grow in later stages. Pegmatites, rich in topaz, tourmaline and feldspar varieties, are often found...in rock crystal garnet in corundum hematite in topaz and euclase mica: biotite, phlogopite or fuchsite...corundum, diamond and emerald • quartz in aquamarine, topaz and emerald • rutile in corundum, quartz and andalusite...have six rays. . Minerals with cleavages such as topaz or moonstone may develop internal cleavages (splitting... 16 Formation and occurrence of gemstones Topaz Topaz, formed hydrothermally, shows characteristic |  | | Book (edition) | | are much particular mineral species, such as topaz, for example, may be widespread and abundant throughout...color are exceedingly uncommon. Pink and orange gem topaz, seen in a geological context, are so rare that...factors. Finally, there is scarcity in size. Topaz, for example. ROCK TYPES occurs in crystals that...ever, topaz crystals of a fine pink color are never seen in sizes larger than a white topaz topaz is...as follows: DENSITY 1. Talc 5. Apatite 8. Topaz 2. Gypsum 6. Feldspar 9. 3. Calcite 7. |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Geol. of Ore Deposits, Acad. of Sciences, Moscow, Russia. Per Nysten: University of Uppsala, Uppsala, Sweden...scratched by topaz and a few other minerals Hard Harder The hardest known mineral 8 9 10 Topaz Corundum...Romania, especially Rosia Montana (Verespatik). In Russia, gold is found on the eastern slope of the Ural...Italy; Smeingorsk, Semenowsky, and Altai, Siberia, Russia; Rudnui(*) and Dhezkazgan(*), Kazakhstan; Salida...Bogoslovsk(*), Nizhne-Tagilsk, and Sverdlovsk, Ural Mts., Russia. Broken Hill(*), NSW, Mt. Isa, Q, and Wallaroo |
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Sanarka River, Chelyabinsk Oblast, Russia