 | | Journal (issue) | | Journal of Gemmology / 2008 / Volume 31 / No. 1/2 Thortveitite – a new gemstone R. Chapman, I.F. Mercer, A...the quest that identified this as gem-quality thortveitite, a scandium yttrium silicate. A faceted stone...were subsequently identified as high-scandium thortveitite. The unusual chemistry indicates a possible...electron microprobe, Raman spectroscopy, scandium, thortveitite, three-phase inclusions Introduction A specimen...edges viewed through the crown facets of the thortveitite. © R. Chapman. tests on this faceted stone |  | Henrique-Pinto, R., Janasi, V.A., Vasconcellos, A.C.B.C., Sawyer, E.W., Barnes, S.-J., Basei, M.A.S., Tassinari, C.C.G. (2015) Zircon provenance in meta-sandstones of the São Roque Domain: Implications for the Proterozoic evolution of the Ribeira Belt, SE Brazil. Precambrian Research, 256. 271-288 doi:10.1016/j.precamres.2014.11.014 | Journal (article/letter/editorial) | | the Proterozoic evolution of the Ribeira Belt, SE Brazil R. Henrique-Pinto a,∗ , V.A. Janasi b , A.C.B.C...Universidade de São Paulo (USP), Brazil c Geologist Consultant, São Paulo, Brazil b a r t i c l e i n f o...Proterozoic metasedimentary successions of southeast Brazil. Trace element chemistry of most detrital cores...Ribeira Belt in the Proterozoic evolution of SE Brazil is still enigmatic in spite of a significant amount...parallel to the coastline of southeast and south Brazil (Hasui et al., 1975), current usage (e.g., Campanha |  | | Journal (issue) | | International Color Association, Porto Alegre, Brazil, November 3–5, pp. 18–21. Ferguson J. (1927) Diamonds...International Geological Congress, Rio de Janeiro, Brazil, August 6–17. Schwarz D. (2001) Sapphires and rubies...Discovered in colorless quartz reportedly from Paraíba State, Brazil, this dendrite is grayish green in transmitted...view 4.39 mm high. said to be from Minas Gerais, Brazil. The material was being marketed as “pink fire”...come from the Brazilian state of Paraíba, and is often sold as “Paraíba” quartz. Our recent examination |  | | Journal (article/letter/editorial) | | (Dill et al., 2006). Type I is largely known in Brazil and Mozambique, where many pegmatites have the...located near the towns of Equador and Parelhas, Brazil, the Alto Serra Branca granitic pegmatite has been...in the state of Paraiba, Brazil, and the Alto dos Quintos pegmatite, Brazil, is situated in the Borborema...expression (Fig. 2e, 4). The pegmatite at Ipe, Brazil, is a flat-lying pegmatite underneath garnet-quartz-mica...Volta Grande (U–B–F–Be)–Ta/Nb–Sn– Li pegmatite, Brazil, lies in the tropical wet and dry landscape (Quéméneur |  | | Book (chapter) | | Bates & Jackson 684 (1987). The Star of Russian Brazil = large euclase, Bukanov 231 (2006). Thetishaar...chevkinite-(Ce), Chudoba EIII, 323 (1966). thortveitite-(Sc) = thortveitite, MR 35, 231 (2004). Thoruranin = Th-rich...haüyne, de Fourestier 360 (1999). turmalina da Paraíba = blue gem Cu-rich elbaite, Atencio 88 (2000)....negra = schorl, Novitzky 29 (1951). turmalina Paraíba = blue gem Cu-rich elbaite, Atencio 88 (2000). |  | | Journal (issue) | | class pegmatites in the Borborema Province in NE-Brazil?.................................................VÝRAVSKY, J., ŠKODA, R., NOVÁK, M. Kristiansenite, thortveitite and ScNbO4: Products of Ca-metasomatism of Sc-enriched...class pegmatites in the Borborema Province in NE- Brazil? Hartmut Beurlen1, Dwight R. Soares3 , Rainer Thomas2...Technology- (IFPB), Campina Grande, Brazil 2 Kerywords: NE-Brazil, magnesiofoitite, Al-rich phlogopite...of gem quality “Paraíba Tourmaline” in granitic pegmatites from Northeastern Brazil. Canadian Mineralogist |  | | Journal (article/letter/editorial) | | Thomsonite-(Ca) Thoreaulite Thorianite Thorite Thortveitite Thorutite Thulite Tiemannite Tinaksite Tincalconite...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...Canada, Dore Lake, Australia, Campo Formoso, Bahia-Brazil) (Barnes and Francis, 1995; Leinonen, 1998; Kojonen...ultrabasic rocks such as in the Bacuri Complex-Amapa, Brazil (Spier and Filho, 2001). Further sites are found | | | Journal (article/letter/editorial) | | Thomsonite-(Ca) Thoreaulite Thorianite Thorite Thortveitite Thorutite Thulite Tiemannite Tinaksite Tincalconite...gold-bearing quartz veins in the southern Para State, Brazil (Angelica et al., 1997). Chromium muscovite named...conglomerate-hosted U deposits of the Randtype at Jacobina, Brazil (pers. com. P. Laznicka). Chromium-bearing garnet...Canada, Dore Lake, Australia, Campo Formoso, Bahia-Brazil) (Barnes and Francis, 1995; Leinonen, 1998; Kojonen...ultrabasic rocks such as in the Bacuri Complex-Amapa, Brazil (Spier and Filho, 2001). Further sites are found |  | | Book | | Deviations 371 Bolivia, 377 332 Proportions Brazil, 378 Angles of Faceted Bulgaria, 399 333 Burma... Cajon, Schmetzer, Heidelberg, De Janeiro, Brazil; Geological ton, VA; seum, Marie and Germany;...date of 1000 of Brazil. by the aborigines 40 Kunz inch (25 Indians of Brazil. these minerals In...pre-Columbian sites of Code, grave tematically of Brazil. labret made from a Colombian emeralds countries...fossils, crystals, misnomer which lasted into Brazil them into fifteen placing terminated semblance |  | | Journal (volume) | | Emeralds from the Piteiras mine, Minas Gerais State, Brazil: genetic implications from fluid inclusion studies...in Itabira is located in the Minas Gerais State, Brazil and produces gem quality emeralds. Ultramafic rocks...property. “Gem-quality” alexandrite specimens from Brazil, India, Madagascar, Russia, Sri Lanka, and Tanzania...sources. Alexandrite samples from the Hematita mines (Brazil) have typically high Sn (up to 2294 ppm) concentrations...showing LA-ICP-MS data [ppm] for alexandrites from Brazil (BZ), Madagascar (MAD), Russia, Sri Lanka, and |  | | Book | | Phyllosilicates Tektosiliates *Olivine, (Mg,Fe)2[SiO4] Thortveitite, Sc2[Si2O7] 3-membered rings: benitoite, BaTi[Si3O9]...well-known geodes in basalt of Rio Grande do Sul, Brazil, contain an outer, banded layer of fine-grained...(100 t), Kazakhstan (100 t), South Africa (90 t), Brazil (85 t), and Papua New Guinea (70 t)(U.S. Geological...in the PR China (700 kt), Mozambique (100 kt), Brazil (96 t), Madagascar (47 kt), Canada (40 kt), India...when the first placer deposits were discovered in Brazil. The kimberlite pipe in Kimberley, South Africa |
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