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

Thomsonite

1,52

1,538

0,018

0,018

2,47

2,47

colourless

1,04 ct, semi-transparent

Gems & Gemology 2023 Winter, p497

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

Thomsonite

1.497

1.544

0.006

0.025

2.25

2.4

1.497

1.530

1.518

1.544

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

Thomsonite

1.497

1.545

0.015

0.02

2.3

2.4

1.497

1.530

1.513

1.532

1.518

1.545

Gemmological Tables, Ulrich Henn, 2004 

Thomsonite

1.497

1.544

0.021

0.021

2.25

2.4

http://www.gemmology.be 

Thomsonite

1.497

1.544

0.021

0.021

2.25

2.4

1.497

1.530

1.513

1.533

1.518

1.544

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Thomsonite

1.497

1.544

0.021

0.021

2.25

2.4

1.497

1.530

1.518

1.518

1.544

1.544

http://www.geminterest.com 

Thomsonite

1.497

1.544

0.021

0.021

2.25

2.4

1.497

1.530

1.513

1.533

1.518

1.544

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

Thomsonite

1.515

1.542

0.006

0.025

2.3

2.4

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Thomsonite

1.52

1.54

0.028

0.028

2.3

2.4

Gems, R Webster, 5th edition 1994 

Thomsonite

1.53

1.53

2.3

2.4

John Sinkakas, Gemstone and mineral data book,1972