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

Charoite

1.55

1.55

2.68

2.68

spot RI

inert

inert

The Journal of Gemmology 1979 N°1, p1-4

Charoite

1.56

1.56

2.77

2.77

violet

93.3 ct, cabochon, spot RI

inert

inert

ACAM lab  4397

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

Charoite

1.548

1.561

0.009

0.009

2.54

2.78

Gemology Tools Professional 2010

Charoite

1.55

1.559

0.009

0.009

2.54

2.68

1.550

1.550

1.553

1.553

1.559

1.559

http://www.geminterest.com 

Charoite

1.55

1.561

0.004

0.009

2.54

2.78

1.550

1.552

1.554

1.561

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

Charoite

1.55

1.561

0.004

0.009

2.54

2.78

1.550

1.552

1.554

1.561

Gemmological Tables, Ulrich Henn, 2004 

Charoite

1.55

1.559

0.009

0.009

2.54

2.68

http://www.gemmology.be 

Charoite

1.55

1.559

0.009

0.009

2.54

2.68

1.550

1.550

1.553

1.553

1.559

1.559

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Charoite

1.55

1.559

0.009

0.009

2.54

2.68

Gems, R Webster, 5th edition 1994 

Charoite

1.55

1.561

0.004

0.009

2.54

2.78

1.550

1.552

1.554

1.561

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Charoite

1.55

1.561

0.004

0.009

2.54

2.78

1.550

1.552

1.553

1.553

1.554

1.561

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

Charoite

1.55

1.56

0.008

0.01

2.5

2.9

Gemmo.eu 

Stone

Colour

Cause of colour

Reference

Charoite

purple

coexistence of traces of Mn³+ and Fe³+  when Mn rich

Gems & Gemology 1993 winter p 292

Charoite

brown

coexistence of traces of Mn³+ and Fe³+  when iron rich

Gems & Gemology 1993 winter p 292