|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Dens min |
Dens max |
Colour |
Location |
Info |
Spectrum |
UVS |
UVL |
Reference |
|
Cubic zirconia - artificial product |
|
|
5.34 |
5.34 |
blue |
|
3.73 ct, tradename: "C-Ox" |
general absorption area around 590nm and a cut-off starting at 650nm |
inert |
inert |
Gems & Gemology 1983 Winter, p232 |
|
Cubic zirconia - artificial product |
|
|
5.52 |
5.52 |
green |
|
4.14 ct, tradename: "C-Ox" |
main absorption area centered at 445nm, with narrower bands at 470, 480,
580, and 600nm and a cut-off from 650nm |
inert |
inert |
Gems & Gemology 1983 Winter, p232 |
|
Cubic zirconia - artificial product |
|
|
5.57 |
5.57 |
green |
|
|
|
|
|
ACAM lab |
|
Cubic zirconia - artificial product |
|
|
5.57 |
5.57 |
greenish blue |
|
19.66ct, high yttrium content: "yttrium zirconium oxide", IR
OTL |
doublets at approximately 520, 540, and 595 nm, a dark band at
approximately 640 nm with a cutoff around 660 nm |
very chalky medium orange |
chalky weak to medium green-yellow |
Gems & Gemology 2005 fall, p262-263 |
|
Cubic zirconia - artificial product |
2.15 |
2.18 |
5.6 |
6 |
|
|
dispersion 0.058-0.066 |
|
|
|
Gems & Gemology 1981 Spring, p9-19 |
|
Cubic zirconia - artificial product |
2.178 |
2.178 |
5.6 |
5.71 |
colourless |
|
|
|
inert |
distinct yellow |
The Journal of Gemmology 1978 N°4, p247 |
|
Cubic zirconia - artificial product |
|
|
5.88 |
5.88 |
yellow |
|
|
|
|
|
ACAM lab |
|
Cubic zirconia - artificial product |
|
|
5.93 |
6.16 |
white, pink, black (pearl imitations) |
|
NONTRANSPARENT (translucent and opaque); aggregate effect under
polariscope |
|
pink stone: weak to moderate chalky light yellow-green |
pink stone: strong yellow |
Gems & Gemology 1991 winter p240-246 |
|
Cubic zirconia - artificial product |
|
|
5.947 |
5.947 |
orange |
|
1ct |
|
|
|
ACAM lab |
|
Cubic zirconia - artificial product |
2.165 |
2.165 |
5.947 |
5.947 |
very weak pink (almost colourless) |
|
|
|
very weak reddish |
weak greenish yellow |
The Journal of Gemmology 1978 N°4, p247 |
|
Cubic zirconia - artificial product |
|
|
5.95 |
6.06 |
pink, lilac, orange, light olive-green, light brown |
|
|
|
lilac+pink stones: faint green, orange stones: pink |
pink stones: yellow-green, orange stones: red, lilac stones: green |
The Journal of Gemmology 1981 Vol 17, N°8, p602-605 |
|
Cubic zirconia - artificial product |
2.17 |
2.17 |
5.95 |
5.95 |
weak yellowish |
|
3.86ct |
|
inert |
very weak greenish yellow |
The Journal of Gemmology 1978 N°4, p247 |
|
Cubic zirconia - artificial product |
|
|
5.952 |
5.952 |
colourless |
|
2.83ct |
|
|
|
ACAM labo |
|
Cubic zirconia - artificial product |
2.24 |
2.24 |
5.97 |
5.97 |
black |
|
opaque, 1.73 ct |
|
inert |
inert |
ACAM lab
942 |
|
Cubic zirconia - artificial product |
2.16 |
2.16 |
6.17 |
6.17 |
pink |
|
26.38ct |
|
yellow |
strong yellow |
ACAM lab
1524 |
TABLES
|
Stone |
RI
min |
RI
max |
Dens
min |
Dens
max |
Reference |
|
Cubic zirconia - artificial product |
2.088 |
2.182 |
5.5 |
6.16 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Cubic zirconia - artificial product |
2.088 |
2.18 |
5.5 |
6 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Cubic zirconia - artificial product |
2.088 |
2.18 |
5.55 |
6 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
|
Cubic zirconia - artificial product |
2.09 |
2.18 |
5.95 |
6.06 |
Gems, R Webster, 5th edition 1994 |
|
Cubic zirconia - artificial product |
2.12 |
2.18 |
5.6 |
6 |
Gemology Tools Professional 2010 |
|
Cubic zirconia - artificial product |
2.14 |
2.2 |
5.15 |
6.1 |
Gemmo.eu
|
|
Cubic zirconia - artificial product |
2.15 |
2.18 |
5.34 |
6 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
|
Cubic zirconia - artificial product |
2.15 |
2.18 |
5.5 |
6.13 |
http://www.geminterest.com |
|
Djevalite artificial product - Cubic Zirconia |
2.172 |
2.182 |
5.6 |
5.7 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Djevalite artificial product - Cubic Zirconia |
2.172 |
2.182 |
5.65 |
5.65 |
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Cubic zirconia - artificial product |
2.176 |
2.176 |
5.5 |
6.2 |
Gemmological Tables, Ulrich Henn,
2004 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Cubic zirconia - artificial product |
lilac, violet |
"doping" with Cobalt, Co2O3, Manganese,
MnO2, Neodymium, Nd2O3, oxides |
Gems & Gemology Spring 1981 p16 |
|
Cubic zirconia - artificial product |
olive green |
"doping" with Chromium, Cr2O3, Thulium,
Tm2O3, Vanadium, V2O3, oxides |
Gems & Gemology Spring 1981 p16 |
|
Cubic zirconia - artificial product |
pink |
"doping" with Erbium, Er2O3, Europium,
Eu2O3, Holmium, Ho2O3, oxides |
Gems & Gemology Spring 1981 p16 |
|
Cubic zirconia - artificial product |
red orange, yellow |
"doping" with Cerium oxides, CeO2, Ce2O3 |
Gems & Gemology Spring 1981 p16 |
|
Cubic zirconia - artificial product |
yellow amber, brown |
"doping" with Copper, CuO, Iron, Fe2O3,
Nickel, NiO, Praesiodymium, Pr2O3, and Titanium, TiO2 oxides |
Gems & Gemology Spring 1981 p16 |
CHEMICAL DATA