|
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 |
Fresnoite |
1.765 |
1.773 |
0.008 |
0.008 |
4.51 |
4.6 |
|
|
|
|
|
|
|
447nm
line |
strong , slightly chalky whitish
yellow |
inert |
Gems & Gemology 2000 Fall
p264-2.65 |
Synthetic
fresnoite |
1.765 |
1.775 |
0.01 |
0.01 |
4.45 |
4.45 |
orange |
|
6.11ct |
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1999 Dec,
p232 |
TABLES
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
Fresnoite |
1.765 |
1.773 |
0.008 |
0.008 |
4.5 |
4.6 |
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 2008
|
Fresnoite |
1.765 |
1.775 |
0.008 |
0.01 |
4.45 |
4.6 |
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
Synthetic
fresnoite |
1.765 |
1.775 |
0.01 |
0.01 |
4.45 |
4.45 |
1.765 |
1.765 |
1.775 |
1.775 |
Gemmological Tables, Ulrich Henn, 2004
|
Synthetic
fresnoite |
1.765 |
1.775 |
0.01 |
0.01 |
4.45 |
4.45 |
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 2008
|
Synthetic
fresnoite |
1.765 |
1.775 |
0.01 |
0.01 |
4.45 |
4.45 |
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA