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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

Azurite

1.73

 

 

 

3.8

3.8

blue, transparent

 

2.508ct

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 1964 N°5,p158

Azurite

1.74

 

 

 

3.68

3.68

blue

 

cabochon

 

 

 

 

 

 

 

 

 

ACAM lab  1619

 

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

Azurite

1.72

1.848

0.108

0.11

3.7

3.9

1.720

1.740

 

 

1.828

1.848

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

Azurite

1.72

1.85

0.11

0.11

3.5

3.89

1.720

1.740

 

 

1.830

1.850

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Azurite

1.72

1.846

0.106

0.106

3.8

3.8

 

 

 

 

 

 

Gemology Tools Professional 2010

Azurite

1.728

1.84

0.105

0.115

3.75

3.91

 

 

 

 

 

 

Gemmo.eu 2013

Azurite

1.73

1.848

0.108

0.11

3.7

3.9

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Azurite

1.73

1.838

0.108

0.108

3.7

3.9

1.730

1.730

1.758

1.758

1.838

1.838

Gemmological Tables, Ulrich Henn, 2004 

Azurite

1.73

1.838

0.108

0.11

3.7

3.9

 

 

 

 

 

 

http://www.gemmology.be 

Azurite

1.73

1.84

0.105

0.111

3.7

3.9

1.730

1.730

1.758

1.758

1.836

1.840

http://www.geminterest.com 

Azurite

1.73

1.836

0.11

0.11

3.77

3.77

1.730

1.730

1.758

1.758

1.836

1.836

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Azurite

1.73

1.84

0.11

0.11

3.73

3.78

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Azurite

1.73

1.84

0.11

0.11

3.77

3.89

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Azurite

1.73

1.84

0.108

0.11

3.7

3.9

1.730

1.730

1.754

1.758

1.828

1.840

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

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Azurite

blue

Cu²+ in elongated octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES