|
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 |
|
Langasite artificial
product |
1.91 |
1.921 |
0.011 |
0.011 |
4.65 |
4.65 |
orange to yellow,
colourless |
|
dispersion
0.035 |
1.92 |
1.92 |
1.91 |
1.91 |
none |
inert |
inert |
Gems & Gemology 2001 fall
p241-242 |
TABLES
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
|
Langasite artificial
product |
1.909 |
1.921 |
0.012 |
0.012 |
4.65 |
4.65 |
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
|
Langasite artificial
product |
1.91 |
1.921 |
0.011 |
0.011 |
4.65 |
4.65 |
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 2008
|
CAUSE OF COLOUR
CHEMICAL DATA (%)