|
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 |
|
ilmenite |
|
|
|
|
|
|
black |
Norway |
4,4ct |
|
|
|
|
|
|
|
https://www.dgemg.com/images/PDF-Newsletter/Newsletter4_2024
2024 nr4 |
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