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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Locality

Info

nx min

nx max

ny min

ny max

nz min

nz max

Spectrum

UVS

UVL

Reference

Brazilianite

1.599

1.623

0.019

0.021

2.96

2.97

 

Agenor Silistrino pegmatite, Araçuaí (Arassuaí),  Jequitinhonha Valley,  Minas Gerais,  Brazil

1.98ct and 3.97ct

1.599

1.602

1.608

1.610

1.619

1.623

 

 

 

The Australian Gemmologist 2015 Vol 25, No.10 p346-353

Brazilianite

1.601

1.624

0.023

0.023

3.01

3.01

yellowish

 

0.66 ct

1.601

1.601

1.610

1.610

1.624

1.624

none

inert

inert

ACAM lab  897

Brazilianite

1.601

1.623

0.019

0.019

2.98

3

 

Telirio mine, Linopolis, Divino das Laranjeiras, Governador Valadares, Rio Doce, Minas Gerais, Brazil

1.47ct, 101ct, 0.56ct

1.601

1.604

1.607

1.609

1.620

1.623

 

 

 

The Australian Gemmologist 2015 Vol 25, No.10 p346-353

Brazilianite

1.602

1.619

0.017

0.017

3.01

3.01

greenish yellow

Divino das Laranjeiras, minas Gerais, Brazil

17.33ct

 

 

 

 

 

 

 

inert

weak yellow

GIA Gem Database  34271

Brazilianite

1.602

1.621

0.019

0.019

2.95

2.95

 

Ari Machado pegmatite, Conselheiro Pena, Minas Gerais, Brazil

53.82ct

1.602

1.602

1.608

1.608

1.621

1.621

 

 

 

The Australian Gemmologist 2015 Vol 25, No.10 p346-353

Brazilianite

1.605

1.621

0.016

0.016

3.01

3.01

light yellow-green

Minas Gerais, Brazil

14.39ct

 

 

 

 

 

 

 

inert

inert

GIA Gem Database  33948

Brazilianite

1.608

1.62

0.012

0.012

2.99

2.99

light greenish yellow

Minas Gerais, Brazil

11.91ct

 

 

 

 

 

 

 

inert

inert

GIA Gem Database  33942

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

nx min

 nx max

ny min

ny max

nz min

nz max

Reference

Brazilianite

1.598

1.625

0.019

0.021

2.94

3

1.598

1.606

 

 

1.617

1.625

Gemme, Dati per l'identificazione, P. De Stefano et al, 1993 

Brazilianite

1.599

1.623

0.019

0.021

2.98

3.03

1.599

1.603

1.609

1.610

1.620

1.623

http://www.geminterest.com 

Brazilianite

1.599

1.624

0.019

0.021

2.94

3

 

 

 

 

 

 

Gemology Tools Professional 2010

Brazilianite

1.6

1.625

0.018

0.022

2.96

3

 

 

 

 

 

 

Gemmo.eu 

Brazilianite

1.602

1.624

0.019

0.021

2.91

2.97

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Brazilianite

1.602

1.623

0.019

0.021

2.98

3

 

 

 

 

 

 

http://www.gemmology.be 

Brazilianite

1.602

1.625

0.018

0.02

2.94

2.99

1.602

1.604

 

 

1.621

1.625

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Brazilianite

1.602

1.623

0.019

0.021

2.98

2.995

1.602

1.602

1.609

1.609

1.621

1.623

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Brazilianite

1.602

1.623

0.019

0.021

2.9

3

1.602

1.602

 

 

1.621

1.623

Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 

Brazilianite

1.603

1.623

 

 

2.99

2.99

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Brazilianite

1.603

1.623

0.02

0.02

2.9

2.98

1.603

1.603

1.612

1.612

1.623

1.623

Gemmological Tables, Ulrich Henn, 2004 

Brazilianite

1.603

1.623

0.02

0.02

2.98

2.995

1.603

1.603

1.612

1.612

1.623

1.623

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

muscovite

Brazilianite

Dr. W.F. Eppler, Praktische Gemmologie, 1984

tourmaline

Brazilianite

Dr. W.F. Eppler, Praktische Gemmologie, 1984

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Brazilianite

 

Conselheiro Pena

Minas Gerais

Brazil

Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification (2006),  873pp

Brazilianite

Corrego Frio Mine, Linopolis, Divino las Laranjeiras, Governador Valadares

Divino das Laranjeiras

Minas Gerais

Brazil

Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification (2006),  873pp

Brazilianite

Telirio mine, Linopolis, Divino das Laranjeiras, Governador Valadares

Rio Doce

Minas Gerais

Brazil

Lapis 10/1990

Brazilianite

Palermo No. 1 mine, Groton

Grafton County

New Hampshire

USA

Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification (2006),  873pp

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

SiO2

Al2O3

FeO

CaO

Na2O

K2O

H2O

F

P2O5

Brazilianite

 

Corrego Frio

Brazil

The Australian Gemmologist 2015, Vol 25, No.10,p350

0.12

41.97

0.04

0.03

8.38

0.01

10.04

 

39.97

Brazilianite

 

Telirio

Brazil

The Australian Gemmologist 2015, Vol 25, No.10,p350

0.17

42.53

0.05

0.02

8.52

0.01

8.99

 

39.28

Brazilianite

 

Sebastiao Cristino

Brazil

The Australian Gemmologist 2015, Vol 25, No.10,p350

0.14

41.5

0.03

0.05

8.26

0.01

9.03

 

39.29

Brazilianite

 

Ari Machado

Brazil

The Australian Gemmologist 2015, Vol 25, No.10,p350

0.02

43.05

0.03

0.01

8.49

0.02

10.13

0.03

39.08

Brazilianite

 

Agenor Silistrino

Brazil

The Australian Gemmologist 2015, Vol 25, No.10,p350

0.02

41.24

0.02

0.02

8.27

0.01

9.93

0.03

39.19