Gemsdat
  

                Home            Gemstones

 

      

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

vivianite

1.585

1.63

0.045

0.045

2.7

2.7

bluish green

Black Bird Mine, Lemhi, Lemhi County, Idaho, USA

0.82ct, transparent

 

 

 

 

 

 

lines at 458, 486

inert

inert

GIA Gem Database  35242

 

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

Vivianite

1.56

1.64

0.05

0.075

2.64

2.64

 

 

 

 

 

 

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Vivianite

1.56

1.564

0.054

0.075

2.6

2.7

1.560

1.585

1.601

1.603

1.635

1.640

Gemmological Tables, Ulrich Henn, 2004 

Vivianite

1.569

1.675

0.04

0.059

2.64

2.68

1.569

1.616

1.602

1.656

1.629

1.675

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Vivianite

1.569

1.675

0.04

0.059

2.64

2.68

 

 

 

 

 

 

http://www.gemmology.be 

Vivianite

1.569

1.675

0.04

0.059

2.64

2.68

1.569

1.616

1.602

1.656

1.629

1.675

http://www.geminterest.com 

Vivianite

1.569

1.675

0.04

0.059

2.64

2.68

1.569

1.616

 

 

1.629

1.675

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

Vivianite

1.569

1.675

0.049

0.059

2.64

2.68

 

 

 

 

 

 

Gemology Tools Professional 2010

Vivianite

1.57

1.65

0.047

0.065

2.58

2.7

1.570

1.600

 

 

1.627

1.650

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

Vivianite

1.58

1.627

0.047

0.047

2.6

2.6

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Vivianite

blue

Fe²+-O-Fe³+ charge transfer

Steffen, Farbe und Lumineszenz von Mineralien, 2000

Vivianite

green

Fe²+

http://minerals.caltech.edu

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)