|
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 |
|
Ilmenite |
|
|
|
|
4.5 |
4.5 |
black |
|
>30ct, imitation of black
diamond |
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2012 Dez,
p63 |
TABLES
|
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
|
Ilmenite |
2.4 |
2.42 |
0.02 |
0.02 |
4.72 |
4.72 |
|
|
|
|
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
|
Ilmenite |
|
|
|
|
4.68 |
4.76 |
|
|
|
|
Gemmo.eu
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)