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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Location

Info

ne min

ne max

no min

no max

Spectrum

UVS

UVL

Reference

Eudialyte

1.596

1.601

0.004

0.004

 

 

 

Kippaw, Quebec, Canada

 

1.600

1.601

1.596

1.597

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1985 34, Nr1/2, p76-78

Eudialyte

1.598

1.628

 

 

2.88

3.07

brownish red

Mont Saint-Hilaire, Quebec, Canada

 

1.605

1.625

1.598

1.628

523nm, 527nm,595nm

 

 

The Journal of Gemmology 1996 Vol 25, N°1,p35

Eudialyte

1.599

1.602

0.003

0.003

 

 

orangy pink

Quebec, Canada

 

 

 

 

 

sharp lines at 521 and 572nm

inert

inert

Gems & Gemology 1993 winter, p287

Eudialyte

1 610

1 615

0.004

0.004

2.91

2.91

 

Kola, Russia

 

1.614

1.615

1.610

1.611

cut-off at 530nm

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1996 Mar, p25-27

Eudialyte

 

 

 

 

2.93

2.93

dark orangy red

Les Lacs-du-Témiscamingue, Québec, Canada

1.52ct, transparent

 

 

 

 

broad absorption below 425nm, lines at 453, 465, 522, 524, 528, 538, 573, 580, 586, 596

inert

inert

GIA Gem Database  35575

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Eudialyte

1.567

1.633

0.002

0.01

2.74

3.01

1.572

1.633

1.567

1.632

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

Eudialyte

1.591

1.623

0.003

0.01

2.74

2.98

 

 

 

 

http://www.gemmology.be 

Eudialyte

1.594

1.623

0.003

0.01

2.74

3

1.594

1.633

1.591

1.623

http://www.geminterest.com 

Eudialyte

1.594

1.623

0.003

0.01

2.74

2.98

1.594

1.633

1.591

1.623

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Eudialyte

1.597

1.602

0.004

0.004

2.8

3

1.597

1.602

1.593

1.598

Gemmological Tables, Ulrich Henn, 2004 

Eudialyte

1.598

1.611

0.004

0.004

2.8

3.1

1.602

1.611

1.598

1.610

Gems, R Webster, 5th edition 1994 

Eudialyte

1.599

1.621

0.001

0.004

2.8

3.1

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Eucolite -Ca-rich eudialyte-

1.634

1.643

0.009

0.009

2.74

2.99

 

 

 

 

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

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Eudialyte

red

Mn³+ in octahedral coordination

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1985, Jg 34, Nr 1/2, p76

Eudialyte

red

Fe²+

Alain Abréal, juillet 2002

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Eudialyte

Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry)

Mont Saint-Hilaire, Rouville County

Quebec

Canada

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1994, Dez, p137

Eudialyte

Kipawa alkaline complex, Sheffield Lake, Villedieu Township

Témiscamingue County

Quebec

Canada

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1985 34, Nr1/2, p76-78

 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

SiO2

Al2O3

MnO

MgO

FeO

TiO2

CaO

Na2O

K2O

ZrO2

Nb2O5

Eudialyte

pinkish red

Kippaw

Canada

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1985, 34, Nr1/2, p76-78

51.54

0.1

1.35

0.09

1.98

0.41

11.82

6.99

0.48

12.36

 

Eudialyte

 

Norra Kärr

Sweden

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1985, 34, Nr1/2, p76-78

53.45

0.73

1.85

 

3.67

0.15

9.28

3.4

0.27

11.7

 

Eudialyte

 

Kola

Russia

Gemmologie, Zeitschrift der Deutschen gemmologischen Gesellschaft, 1996, Mar p27

48.25

0.29

1.43

0.1

4.84

0.45

6.53

14.03

0.49

13.95

0.53