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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

Sturmanite

1.5

1.5

 

 

1.86

1.86

yellow

 

3.82ct cabochon, translucent, spot RI

 

 

 

 

 

 

 

Gems & Gemology 1997 Fall, p222-223

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Sturmanite

1.499

1.505

0.005

0.005

1.84

1.86

 

 

 

 

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

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)