👁 Image
| | Report (issue) | | (Cigana) claim, Conselheiro Pena, Minas Gerais, Brazil. The specimens consist
of intergrown crystal crests...(Cigana) claim, Conselheiro Pena,
Minas Gerais, Brazil. Weinrich Minerals, Inc. specimen and photo.
3...the Ilha claim, Taquaral, Itinga, Minas Gerais,
Brazil. The Arkenstone specimen and photo.
From the same...black
tantalite-(Fe) crystals from Parelhas, Rio Grande do Norte, priced at $2,450. And he has a
larger...
Tantalite-(Fe), 3.7 cm, from Parelhas, Rio Grande do
Norte, Brazil. The Arkenstone specimen and photo | 👁 Image
| | Journal (issue) | | ARTICLES
260
An Update on “Paraíba” Tourmaline from Brazil
James E. Shigley, Brian C. Cook, Brendan M. Laurs...tourmalines are also being mined in
adjacent Rio Grande do Norte State.
278
pg. 261
Spessartine Garnet from...corundum from
Wyoming • Green kyanite from Bahia, Brazil • “Ruby Rock” cabochons •
Tourmaline from Warner...More recently, Brendan
has visited Madagascar and Brazil to obtain first-hand
knowledge of important gem...of gemological topics: “Paraíba” tourmaline from
Brazil, spessartine garnet from California, Malaya garnet | 👁 Image
| | Book | | Professor Jacques P. Cassedanne
Universidade Federal do Rio de Janeiro
For his valuable participation in research...1982 Jules Roger Sauer
”
Foreword
For years Brazil has been the major producer of colored stones in...metamorphic rocks, the variety of gem deposits in Brazil is
almost infinite.
In addition to the mineral...assemblage one might expect from pegmatite dikes, Brazil also
produces a very significant output of diamonds...written in English, and beautifully illustrated.
“Brazil, Paradise of Gemstones’, by Jules Roger Sauer, | 👁 Image
| | Journal (article/letter/editorial) | | Pegmatitic Province (BPP) from
Rio Grande do Norte in Northeast Brazil. The Boqueirao granitic pegmatite...important sources (i.e., Afghanistan
(Panjsher Valley), Brazil (Itabira), Colombia (Coscuez), Ethiopia (Shakisso)...minerals (kyanite, green andalusite, garnet -grossular,
and spessartine- and red-epidote) of “near” gem-quality...Gem-Bearing Boqueirão Granitic Pegmatite, Parelhas, Rio Grande do
Norte, Brazil. Minerals 2019, 9, 233. [CrossRef] | 👁 Image
| | Journal (article/letter/editorial) | | e d i n t h i s i n d e x . Acari, Rio Grande do Notre, Brazil, Bismutotantalite, 785. Adularia,Zambia...India, 1018. Alto Feio, Pedra Lavrada, Paraiba, Brazil, bismoclite, bismuth, bismutite, 785. Alunite,...li. Arrojadite, Brazil, d.t.a., 427. Arsenic, geochemistry of, 88. Arsenobismite, Brazil, 785. Artern,...Bancroft, Ontario, peristerite, 165. Barbosalite, Brazil, 784. Barium feldspars, see Barinm-orthoclase,...Bismoclite, Brazil, 785. Bismuth, native, Brazil, 785. Bismuthinite, Brazil, 785. Bismutite, Brazil, 785. Bismutotantalite | 👁 Image
| | Book | | BARTORELLI
::• . . ..
MINERALS
& PRECIOUS
STONES
OF BRAZIL
Sponsored by:
VALE
MINISTER.IO
DA CULTURA
©...Crystal of multicolored tourmaline
(84 x 26 mm), Lavra do Sapo,
Ferruginha, Conselheiro Pena,
Minas Gerais...Publication Data (CIP)
(Camara Brasileira do Livro, SP, Brazil)
Aquamarine (113 mm high), Medina,
Minas...Cornejo, Carlos
.Minerals & precious stones of Brazil.
Carlos Cornejo, Andrea Bartorelli.
[franslation:...pedras preciosas do Brasil
Amethyst flower (85 x 60 mm),
Ametista do Sul, Rio Grande do
Sul. Collection | 👁 Image
| Souza Neto, João Adauto, Legrand, Jean Michel, Volfinger, Marcel, Pascal, Marie-Lola, Sonnet, Philippe (2008) W–Au skarns in the Neo-Proterozoic Seridó Mobile Belt, Borborema Province in northeastern Brazil: an overview with emphasis on the Bonfim deposit. Mineralium Deposita, 43 (2) 185-205 doi:10.1007/s00126-007-0155-1 | Journal (article/letter/editorial) | | Mobile Belt,
Borborema Province in northeastern Brazil: an overview
with emphasis on the Bonfim deposit...located in the
Borborema Province in northeastern Brazil and consists of
a gneiss basement (Archean to Paleo-Proterozoic)...Recife, Brazil
e-mail: adauto@ufpe.br
J. M. Legrand
Departamento de Geologia,
Universidade Federal do Rio...Rio Grande do Norte,
Campus Universitário,
Lagoa Nova,
CEP 59.072-970 Natal, Brazil
M. Volfinger : M.-L...Bonfim .
Borborema Province . Seridó Mobile Belt . Brazil
Introduction
Skarn deposits host a large variety | 👁 Image
| | Journal (article/letter/editorial) | | Simla Jhunjhunu district, Rajasthan: almandine, grossular, 1018. Andhra Pradesh Kondapalli: charnockite...AMERICA Bolivia Coehabamba: crocidolite, 291. Brazil Bahia NORTH AMERICA Greenland flimaussag:...peristerite, 165. Tecomamine, Utah: wulfenite, 995. Rio $5o JoSo, Paragua~u : svanbergite, 427. Ceard Ico...bismutotantalite, 785. Rio de Janeiro Serra da Tingua : pseudoleucite, 596. Rio Grande do Notre Acari: bismutotantalite...bismutotantalite, 785. Bogueirao mine, Parelhas : barbosalite, leucophosphite, 784; bismuth, bismuthinite | 👁 Image
| | Journal (issue) | | MAY–JUNE 2025 Articles Euclase Occurrences in Brazil..................................................Euclase, 4 cm, from the Alto do Giz pegmatite, Rio Grande do Norte, Brazil. Crystal Classics specimen,...28, 2025. WEW Susan M. Robinson (1949–2025). Grossular, 1.5 cm, from Asbestos, Quebec; acrylic painting...Occurrences in Brazil Mario Luiz de Sá C. Chaves1 Carlos Cornejo2 Luíza Almeida Villar de Queiroz3 Brazil is a...pegmatites and hydrothermal quartz veins. INTRODUCTION Brazil is a “giant” in the production of mineral resources | 👁 Image
| | Journal (issue) | | commonly exchangeable. In
many zeolites, not only do the extra-framework cations vary
widely, but so also...concession at A hlfeld’s tungsten mine at Chicote Grande, which
produced hundreds of “wolframite” specimens...New York,
2, 739.
PEREZ, B. C., and TENAGO Y DEL RIO, J. G. (1992) Minas y
Minerales de Iberoamerica....same small
core group of people show up early to do most of the bull work. O f
course, this is true with...Arizona
material) was offered from Ibiajara, Bahia, Brazil. Most specimens
are in the miniature range, although | 👁 Image
| | Journal (issue) | | Paraiba Tourmaline Revisited
Paraiba Tourmaline from Brazil –
The Neon-Blue Burn
Mozambique Paraiba Tourmaline...& Jewelry Industry
President
Clement Sabbagh, Brazil
Vice Presidents
Damien Cody, Australia
Nirmal Kumar...Kumar Bardiya, India
Treasurer
Marcelo Ribeiro, Brazil
Secretaries
Bruce Bridges, USA
Santpal Sinchawla... InColor
Rio Tinto Unveils Its Largest
Vivid Pink Diamond
The 3.14-ct Argyle Alpha
diamond.
Rio Tinto has...and New York with bids
closing on 10 October 2018.
Rio Tinto chief executive J-S Jacques said “I am delighted | 👁 Image
| | Journal (issue) | | Articles
708 Coloured Stone Mining and Trade in Brazil:
A Brief History and Current Status
By Aurélien...Collection
V. L. Villani photo
p. 758
Cover Photo:
Brazil is the source of a variety of coloured stones,...Saint-Clair
Fonseca Junior (BC Gemas do Brasil, Governador
Valadares, Brazil), and heating to 500°C in air was...Reportedly from Ethiopia
Tsavorite, the green grossular garnet originally found
in the Tsavo area of Kenya...as major elements and confirmed the samples
as grossular. Compared to tsavorite from other
localities, | 👁 Image
| | Catalog/List | | MnFeMg Al (P0 ) (0H) 8H o, Lavra de Ilha, M.G., Brazil. Tan to pink
4 4
2 2 a roscher1te
2 2group species...CERIANITE, Ceo , Pocos de Caldas, Minas Gerais, Brazil. Described material2
free reprint (a)
powder in...$25.00
81B30 SPODUMENE, Figueira do Rio Doce, Minas Gerais, Brazil. (a) Outstanding single
spodumene...display) .•• $20.00
81B32 GROSSULAR, Snohomish, Washington. (a) brown grossular crystals, (to 0.8 cm) with...x 0. 8 cm) on matrix (5 x 5.5 cm) with drusy grossular and diopside ••• $22.50 (L)
81B35 WILLEMITE, Franklin | 👁 Image
| | Journal (issue) | | ........................................... 13
Brazil .................................................Lapidary, Hong Kong; CMP Asia, Hong Kong; GEA, Brazil; Emmanuel
Piat, France; Israel Emerald Cutters...Sri Lanka
Jacqui Grande, USA
DIRECTORS
Andrew Cody, Australia
Sergio Martins, Brazil
Emmanuel Piat, France...to improve the color. Some kunzite buyers
from Brazil also discovered that rough crystals they purchased...
CY CMY
K
2006 MINING REPORT
C
ompared to Brazil, its land-locked neighbor, Bolivia is
a small country—it | 👁 Image
| | Journal (issue) | | Manganotantalite from the Alto do Giz area, Equador,
Rio Grande do Norte, Brazil . . . . . . . . . . . . ....
Guest Editorial
Collection Disposal
What to do with one’s mineral collection now that the golden...particular aesthetic, and probably many others that do not
immediately come to mind.
Selling or giving to...available for purchase, but no funds with
which to do so.
2. Excellent display-type collection offered...pictured in every issue before it goes to press—to do so would
require us to have a Private Investigator | 👁 Image
| | Journal (issue) | | right: Topaz, 8.4 cm, from Ouro Preto, Minas Gerais, Brazil.
Lower left: Phosphophyllite, 2 cm, from the Unificada...Unificada mine, Potosi, Bolivia.
Bottom right: Grossular, 3.5 cm, from Eden Mills, Vermont
v
This special...perfection-seeker first
sees a specimen, his eyes do a quick inventory of dings. If he finds
none, out...competitive. Emphasis on perfection has little to do with science in that
perfection is an accident and...available to us to find, buy, enjoy and learn from if we
do not insist on absolute specimen perfection. If everyone | 👁 Image
| | Journal (issue) | | Namibia, as well as
Madagascar), South America (Brazil and
Colombia), central and southern Asia (Sri
Lanka...Pakistan; and pink to red tourmalines from Nigeria and Brazil. Diamond was mined in northern Canada for the first...mining also continued at traditional
sources in Brazil and Africa. Large quantities of
Brazilian emeralds...reserves and reduced
demand. Emerald production in Brazil has since
continued to decline.
Several sources...especially a problem for emeralds from Colombia
and Brazil, which led to greater market demand for
African | 👁 Image
| | Journal (issue) | | (3) a 1.53 pink diamond from Argyle, courtesy of Rio Tinto; (4) an 11.16 ct sapphire from Madagascar,...market was
down to 42% by value and 29% by volume (Rio
Tinto Diamonds, 2008). It had unloaded its diamond...
PRODUCTION AND MARKETS
Rio Tinto. In 2003, London-based mining giant Rio
Tinto opened Canada’s second...second diamond mine,
Diavik, with 60% ownership. Rio Tinto had established its own rough diamond sales channel...carats over the following several years (Rio Tinto Diamonds, 2006). Rio
Tinto marketed its share and its Argyle | 👁 Image
| | Journal (issue) | | ineralogy of the Boqueiraozinho pegmatite, Parelhas,
Rio Grande do Norte, B r a z il...........................overlain by
volcanics containing vesuvianite-grossular
skam
Native bismuth, bismuthinite,
bismutite...least, I wish to thank my wife, Eva, who often had to do without
my presence, so that I could complete this...Universitaria, Bloco BS
58.100 Campina Grande
Paraiba, Brazil
The Boqueiraozinho pegmatite has been...lies approximately 3 km east of the village of Parelhas,
*Formerly at Canadian Museum of Nature, Ottawa | 👁 Image
| | Book | | 5 x 6 x 3 cm
Page 251: Calcite, Irai, Rio Grande do Sul, Brazil * 12.5 x 10 x 10.5 cm
Page 252: Gypsum...created by. living organisms
do not qualify as minerals, even though they do
contain fibrous crystals of...environment.
solidified. In some basalts of India and Brazil, these cavities are
large enough for a person...ABOVE: Imperial topaz, Ouro Preto, Minas Gerais, Brazil * 3.3 x 2.7 x 1.8 cm, 159.10 ct
RIGHT: Round brilliant-cut...themselves in the
ground when they hit but they won't do a lot of damage (unless
they hit a car, which has | 👁 Image
| | Book | | 5 x 6 x 3 cm
Page 251: Calcite, Irai, Rio Grande do Sul, Brazil * 12.5 x 10 x 10.5 em
Page 252: Gypsum...biological rather than geological
do not qualify as minerals, even though they do
contain fibrous crystals of...environment.
solidified. In some basalts of India and Brazil, these cavities are
large enough for a person...ABOVE: Imperial topaz, Ouro Preto, Minas Gerais, Brazil ° 3.3 x 2.7 x 1.8 om, 159.10 ct
RIGHT: Round brilliant-cut...themselves in the
ground when they hit but they wont do a lot of damage (unless
they hit a car, which has | 👁 Image
| | Journal (issue) | | International entries are not peer-reviewed sections but do undergo technical and editorial review.
Editorial...2008).
Some processes remain poorly understood. Why do
some areas show clinohumite with red spinel while...elements. The other trace elements detected either do not give rise to absorption in the visible range...embraced traditional Chinese symbols, they sometimes
do not apply or combine them properly, making
them less...innovation in the near future. In
2013 and 2014, Rio Tinto launched a series of commercial lines of its | 👁 Image
| | Book | | some of the reasons why minerals look
the way they do and are found in some places and not others.
Such...the extrusive igneous rocks. The intrusive rocks do
not reach the surface but on rapid cooling may cut...their
crystal structure, and chemical relationships do illustrate the
way in which particular species were...Twinning in quartz is virtually universal;
Dauphine, Brazil and Japan twins are the most common types
and twinning...dislocations
help crystals to grow since fresh nuclei do not have to be
continually produced. Dislocation-free | 👁 Image
| | Journal (issue) | | mirror-bright hematite crystals from
the Veta Grande claim; pyrite and golden barite frorn the Magma...and the Mexican
states of Sonora, Baja California Norte and Baja California Sur,
an area roughly equivalent...after pyrite with specular
hematite, 4 cm, from Rio
Marina mine, Elba, Itaty.
Ex Dr. G. Garbari specimen...the Tucso~ area in 2010, something I've wanted to
do for many years. Needing something to keep me active...crystals on blue chalcedony, 15 cm, from Rio Grande do
Sol, Brazil. Jeff Scovil photo.
Smithsonite, 10.8 | 👁 Image
| | Book | | Boqueirão Granitic Pegmatite,
Parelhas, Rio Grande do Norte, Brazil
Reprinted from: Minerals 2019, 9...Pegmatitic Province (BPP) from
Rio Grande do Norte in Northeast Brazil. The Boqueirao granitic pegmatite...important sources (i.e., Afghanistan
(Panjsher Valley), Brazil (Itabira), Colombia (Coscuez), Ethiopia (Shakisso)...minerals (kyanite, green andalusite, garnet
-grossular, and spessartine- and red-epidote) of “near” gem-quality...Gem-Bearing Boqueirão Granitic Pegmatite, Parelhas, Rio Grande do
Norte, Brazil. Minerals 2019, 9, 233. [CrossRef] |
|
