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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

Richterite

1.599

1.622

0.023

0.023

3.11

3.11

light brownish yellow

Afghanistan

1.72ct

 

 

 

 

 

 

 

Weak yellowish orange

Weak orange

Gems & Gemology 2004 Fall, p256

 

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

Richterite

1.602

1.642

0.016

0.024

2.86

3.46

 

 

 

 

 

 

Gemmo.eu 2013

Richterite

1.604

1.664

0.016

0.02

2.97

3.45

1.604

1.648

1.618

1.656

1.624

1.664

Gemmological Tables, Ulrich Henn, 2004 

Richterite

1.605

1.641

0.013

0.021

2.97

3.45

1.605

1.624

1.618

1.640

1.625

1.641

http://www.geminterest.com 

Richterite

1.605

1.641

0.017

0.022

2.97

3.45

1.605

1.624

 

 

1.627

1.641

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Richterite

1.605

1.641

0.017

0.022

2.97

3.45

1.605

1.624

1.618

1.640

1.627

1.641

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

Richterite

1.615

1.636

0.021

0.021

3.09

3.09

 

 

 

 

 

 

Gemology Tools Professional 2010

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)