|
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 |
Thomsonite |
1,52 |
1,538 |
0,018 |
0,018 |
2,47 |
2,47 |
colourless |
|
1,04 ct, semi-transparent |
|
|
|
|
|
|
|
|
|
Gems & Gemology 2023
Winter, p497 |
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 |
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 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)