|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
Colour |
Location |
Info |
ne min |
ne max |
no min |
no max |
Spectrum |
UVS |
UVL |
Reference |
|
Lithium niobate, artificial
product |
2.21 |
2.3 |
0.09 |
0.09 |
4.65 |
4.65 |
colourless |
|
|
|
|
|
|
|
|
|
Gems & Gemology 1968 Winter,
p379 |
|
Lithium niobate, artificial
product |
2.263 |
2.263 |
|
|
4.63 |
4.63 |
colourless |
|
1.49ct, RI reading
gemmeter |
|
|
|
|
|
|
|
ACAM Lab
|
TABLES
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
|
Lithium niobate, artificial product
|
2.16 |
2.28 |
0.072 |
0.107 |
4.64 |
4.66 |
2.160 |
2.202 |
2.195 |
2.280 |
Tables of Gemstone
Identification, Roger Dedeyn, Ivo Quintens, 2007
|
|
Lithium niobate, artificial product
|
2.202 |
2.273 |
0.071 |
0.071 |
4.64 |
4.66 |
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
|
Lithium niobate, artificial product
|
2.202 |
2.273 |
0.071 |
0.071 |
4.64 |
4.66 |
2.202 |
2.202 |
2.273 |
2.273 |
Gemmological Tables, Ulrich Henn, 2004
|
|
Lithium niobate, artificial product
|
2.21 |
2.3 |
0.09 |
0.09 |
4.64 |
4.66 |
2.300 |
2.300 |
2.210 |
2.210 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
|
Lithium niobate, artificial product
|
2.21 |
2.3 |
0.09 |
0.09 |
4.64 |
4.64 |
|
|
|
|
John Sinkakas, Gemstone and
mineral data book,1972
|
|
Lithium niobate, artificial product
|
2.21 |
2.3 |
0.9 |
0.9 |
4.64 |
4.66 |
2.300 |
2.300 |
2.210 |
2.210 |
http://www.geminterest.com
|
|
Lithium niobate, artificial product
|
2.21 |
2.3 |
|
|
4.64 |
4.66 |
2.210 |
2.210 |
2.300 |
2.300 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
|
Lithium niobate, artificial product
|
2.21 |
2.3 |
0.09 |
0.09 |
4.64 |
4.64 |
|
|
|
|
Gems, R Webster, 5th edition
1994
|
CAUSE OF COLOUR
CHEMICAL DATA (%)