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INVESTIGATIONS

Stone

RI min

RI max

Dens min

Dens max

Colour

Location

Info

Spectrum

UVS

UVL

Reference

synthetic sodalite

1.48

1.48

2.42

2.42

blue

made in China

 

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1994 Jun, p4

Sodalite

1.48

1.48

2.41

2.41

colourless

Afghanistan

0.12ct

 

yellow-green

yellowish

ACAM labo  922

Sodalite

1.48

1.48

2.3

2.3

blue

 

4ct, opaque

 

 

 

ACAM labo  4074

Hackmanite - sodalite

1.482

1.482

2.24

2.35

pink to light violet, light yellow

Canada

photochroism (after 10-15' violet colour is gone), 2 x 0.11 ct

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2008 Dec, p121

Sodalite

1.484

1.484

2.3

2.3

colourless

Afghanistan

0.70ct

 

inert

faint orange

http://www.spec4gem.info/index.php 2016

Hackmanite - sodalite

1.485

1.487

2.3

2.32

pinkish, yellowish (pink to violet-red after UV)

Mount st. Hilaire, Quebec, Canada

photochroism; strong orange-red phosphorescence, 0.27 ct to 1.31 ct

 

strong orange-red

strong orange-red

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1991 Sep, p93-97

Hackmanite - sodalite

1.485

1.485

2.37

2.37

light yellow

Mont Saint-Hilaire, Québec, Canada

2.94ct

 

weak orange

strong orange

GIA Gem Database  35405

Sodalite

1.49

1.49

2.31

2.31

violetish blue

Namibia

5.74ct, translucent

broad absorption above 665nm

inert

inert

GIA Gem Database  35515

 

TABLES

Stone

RI min

RI max

Dens min

Dens max

Reference

Sodalite

1.477

1.487

2.13

2.3

http://www.geminterest.com 

Sodalite

1.479

1.483

2.15

2.35

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Hackmanite - sodalite

1.479

1.487

2.15

2.4

Gemology Tools Professional 2010

Sodalite

1.479

1.487

2.15

2.4

Gemology Tools Professional 2010

Sodalite

1.48

1.48

2.2

2.4

John Sinkakas, Gemstone and mineral data book,1972 

Sodalite

1.48

1.487

2.2

2.4

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Sodalite

1.48

1.487

2.13

2.4

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

synthetic sodalite

1.48

1.48

2.42

2.42

Gemmological Tables, Ulrich Henn, 2004 

Sodalite

1.48

1.487

2.15

2.35

Gems, R Webster, 5th edition 1994 

Sodalite

1.48

1.487

2.14

2.4

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

Sodalite

1.482

1.488

2.21

2.35

Gemmo.eu 

Sodalite

1.483

1.487

2.27

2.33

Gemmological Tables, Ulrich Henn, 2004 

Hackmanite - sodalite

1.483

1.487

2.14

2.4

http://www.gemmology.be 

Sodalite

1.483

1.487

2.14

2.4

http://www.gemmology.be 

Sodalite

1.483

1.487

2.14

2.4

Joel Arem, Color Encyclopedia of Gemstones, 1987 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Sodalite

blue

SO4- colour center

Steffen, Farbe und Lumineszenz von Mineralien, 2000

Sodalite

blue

interstitial oxygen ion O- near Al or Si

Gems & Gemology Summer 1988

Hackmanite - sodalite

pink

colour centre

Steffen, Farbe und Lumineszenz von Mineralien, 2000

Hackmanite - sodalite

pink

unstable electron substituting for Cl- in a tetrahedron of Na+ ions

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Sodalite

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

Mont Saint-Hilaire, Rouville County

Quebec

Canada

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1994, Dez, p137







 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

SiO2

Al2O3

Na2O

Cl

Hackmanite - sodalite

 

Mont-St. Hilaire, Quebec

Canada

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1991, Sep, p94

36.6

31.6

23.6

7.01