|
INVESTIGATIONS
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
Colour |
Locality |
Info |
nx min |
nx max |
ny min |
ny max |
nz min |
nz max |
Spectrum |
UVS |
UVL |
Reference |
|
Monazite |
|
|
|
|
5.18 |
5.18 |
brownish-black |
Sri Lanka |
|
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1999 Mar, p3 |
|
Monazite |
1.795 |
1.845 |
0.05 |
0.05 |
5.247 |
5.247 |
reddish orange |
Sri Lanka |
|
|
|
|
|
|
|
|
inert |
inert |
The Journal of Gemmology 1977 N°6, p295-299 |
|
Monazite |
1.79 |
|
|
|
5.35 |
5.35 |
|
Brazil |
0.17ct |
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2008 Dec, p117-118 |
|
Monazite |
|
|
|
|
5.36 |
5.36 |
orangy red |
Brazil |
1.01ct |
|
|
|
|
|
|
lines at 535, 542, 600, 603, 625, 630, 673, 680, 695nm, band at 515-520
and 525-533 and 575-595nm |
inert |
inert |
GIA Gem Database 35581 |
TABLES
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
nx min |
nx max |
ny min |
ny max |
nz min |
nz max |
Reference |
|
Monazite |
1.773 |
1.85 |
0.047 |
0.057 |
4.6 |
5.6 |
|
|
|
|
|
|
Gemmo.eu 2017 |
|
Monazite |
1.774 |
1.849 |
0.049 |
0.055 |
4.6 |
5.4 |
1.774 |
1.800 |
1.777 |
1.801 |
1.828 |
1.849 |
http://www.geminterest.com |
|
Monazite |
1.774 |
1.849 |
0.049 |
0.055 |
4.6 |
5.4 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Monazite |
1.774 |
1.849 |
0.049 |
0.055 |
4.6 |
5.4 |
1.774 |
1.800 |
1.777 |
1.801 |
1.828 |
1.849 |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |
|
Monazite |
1.774 |
1.849 |
0.049 |
0.055 |
4.6 |
5.4 |
1.774 |
1.800 |
1.777 |
1.801 |
1.828 |
1.849 |
Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
|
Monazite |
1.774 |
1.849 |
0.049 |
0.055 |
5.4 |
5.4 |
1.774 |
1.800 |
1.777 |
1.801 |
1.828 |
1.849 |
Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification
(2006), 873pp |
|
Monazite |
1.795 |
1.845 |
0.05 |
0.05 |
5.2 |
5.2 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994 |
|
Monazite |
1.796 |
1.841 |
0.045 |
0.045 |
4.8 |
5.5 |
1.796 |
1.796 |
1.797 |
1.797 |
1.841 |
1.841 |
Gemmological Tables, Ulrich Henn,
2004 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Monazite |
brown, orange |
rare earth elements |
http://minerals.caltech.edu |
|
Monazite |
colour change |
rare earth elements,
specifically Ndł+ |
http://www.minsocam.org/ |
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)
|
Stone |
Colour |
Locality |
Reference |
SiO2 |
Al2O3 |
MnO |
CaO |
Na2O |
Cr2O3 |
K2O |
P2O5 |
PbO |
ZrO2 |
ThO2 |
UO2 |
BaO |
La2O3 |
Ce2O3 |
PrO2 |
Nd2O3 |
Sm2O3 |
Eu2O3 |
Gd2O3 |
Tb2O3 |
Dy2O3 |
Er2O3 |
Yb2O3 |
U3O8 |