Stone

RI min

RI max

Dens min

Dens max

Colour

Location

Info

Spectrum

UVS

UVL

Reference

Ivory

1.55

1.55

1.99

1.99

spinach green (stained)

beads, stained walrus ivory, jade imitation

The Journal of Gemmology 1975 N°6,p288-291

Stone

RI min

RI max

Dens min

Dens max

Reference

Ivory

1.52

1.57

1.7

1.95

Gemmological Tables, Ulrich Henn, 2004 

Ivory

1.52

1.57

1.7

1.97

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

Ivory

1.53

1.57

1.7

2

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

Ivory

1.535

1.57

1.7

2

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Ivory

1.535

1.54

1.7

2

Gemology Tools Professional 2010

Ivory

1.535

1.55

1.7

2

Gemmo.eu 2017

Ivory elephant

1.537

1.543

1.7

1.85

http://www.gemmology.be 

Ivory hippopotamus

1.537

1.543

1.85

1.98

http://www.gemmology.be 

Ivory

1.54

1.54

1.7

1.98

John Sinkakas, Gemstone and mineral data book,1972 

Ivory

1.54

1.54

1.7

1.98

Gems, R Webster, 5th edition 1994