|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
|
YAG, artificial product |
|
|
4.54 |
4.54 |
green |
|
10.29ct |
|
|
|
The Journal of Gemmology 2002 Vol 28, N°2, p76 |
|
YAG, artificial product |
|
|
4.55 |
4.55 |
colourless |
|
|
|
|
|
ACAM labo |
|
YAG, artificial product |
|
|
4.55 |
4.55 |
green |
|
emerald imitation, 5.56ct |
|
|
|
Gems & Gemology 1992 Summer, p125 |
|
YAG, artificial product |
|
|
4.56 |
4.56 |
bluish purple |
|
Russian YAG |
|
moderate orange |
inert |
Gems & Gemology 1996 Winter,
p270-276 |
|
YAG, artificial product |
|
|
4.573 |
4.573 |
green |
|
|
760nm, 600nm, 582nm |
|
|
ACAM labo |
|
YAG, artificial product |
|
|
4.58 |
4.58 |
blue-violet |
|
"purple coranite", tanzanite imitation, 0.72ct |
broad band at approximately 540 nm |
strong chalky orange |
|
Gems & Gemology 1996 Winter,
p270-276 |
|
YAG, artificial product |
|
|
4.617 |
4.617 |
blue |
|
|
650nm, 600nm, 510nm |
|
|
ACAM labo |
|
YAG, artificial product |
|
|
4.62 |
4.62 |
colourless |
|
1.67ct |
|
orange-yellow |
orange |
ACAM Lab
|
|
YAG, artificial product |
1.885 |
1.885 |
5.05 |
5.05 |
green |
|
|
broad band 570-620nm, lines at 660, 670 and 690 |
red |
red (stronger tann UVS) |
Gems & Gemology 1986 spring p53 |
|
YAG, artificial product |
|
|
|
|
with reverse colour change (orange pink in daylight, yellow in
incandescent light) |
|
|
|
|
|
Gems & Gemology 2007 winter, p386 |
TABLES
|
Stone |
RI
min |
RI
max |
Dens
min |
Dens
max |
Reference |
|
YAG, artificial product |
1.82 |
1.835 |
4.5 |
4.75 |
Gemmo.eu
|
|
YAG, artificial product |
1.823 |
1.843 |
4.5 |
4.6 |
Gemology Tools Professional 2010 |
|
YAG, artificial product |
1.83 |
1.83 |
4.55 |
4.57 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
|
YAG, artificial product |
1.83 |
1.834 |
4.57 |
4.6 |
John Sinkakas, Gemstone and mineral data
book,1972 |
|
YAG, artificial product |
1.83 |
1.833 |
4.4 |
5.08 |
http://www.gemmology.be |
|
YAG, artificial product |
1.83 |
1.9 |
4.55 |
4.71 |
http://www.geminterest.com |
|
YAG, artificial product |
1.83 |
1.83 |
4.57 |
4.6 |
Gems, R Webster, 5th edition 1994 |
|
YAG, artificial product |
1.832 |
1.873 |
4.5 |
4.6 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
YAG, artificial product |
1.832 |
1.834 |
4.55 |
4.6 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
YAG, artificial product |
1.833 |
1.833 |
4.55 |
4.55 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
YAG, artificial product |
1.833 |
1.833 |
4.55 |
4.55 |
Gemmological Tables, Ulrich Henn,
2004 |
|
YAG, artificial product |
1.833 |
1.833 |
4.55 |
4.57 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
CAUSE OF
COLOUR
CHEMICAL DATA
(%)