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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

Vlasovite

1.607

1.625

0.018

0.018

3

3

brownish yellow, transparent

Canada

0.72ct

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2008 Dec, p122

Vlasovite

1.608

1.627

0.019

0.019

2.95

2.95

brownish-yellow

Russia

0.34 ct

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1997 Jun, p66

Vlasovite

1.609

1.624

0.015

0.015

 

 

brownish yellow

Quebec, Canada

 

 

 

 

 

 

 

none

 

weak , moderately chalky, brownish orange

Gems & Gemology 1993 winter, p287-288

 

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

Vlasovite

1.604

1.626

0.017

0.021

2.91

2.98

 

 

 

 

 

 

Gemmo.eu 2013

Vlasovite

1.607

1.628

0.021

0.021

2.96

2.98

 

 

 

 

 

 

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

Vlasovite

1.607

1.628

0.021

0.021

2.97

2.97

1.607

1.607

1.623

1.623

1.628

1.628

Gemmological Tables, Ulrich Henn, 2004 

Vlasovite

1.607

1.628

0.019

0.021

2.95

2.97

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Vlasovite

1.607

1.628

0.021

0.021

2.97

2.97

 

 

 

 

 

 

Gemology Tools Professional 2010

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Vlasovite

Kipawa alkaline complex, Sheffield Lake, Villedieu Township

Témiscamingue County

Québec

Canada

Gems & Gemology 2012 Spring, p59

 

CHEMICAL DATA (%)