|
INVESTIGATIONS
TABLES
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
|
Lithium tantalate artificial
product |
2.175 |
2.18 |
0.005 |
0.005 |
7.3 |
7.3 |
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
|
Lithium tantalate artificial
product |
2.175 |
2.22 |
0.006 |
0.006 |
7.3 |
7.5 |
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
|
Lithium tantalate artificial
product |
2.18 |
2.175 |
0.005 |
0.006 |
7.3 |
7.5 |
2.180 |
2.220 |
2.175 |
2.175 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
CAUSE OF COLOUR
CHEMICAL DATA (%)