|
INVESTIGATIONS
TABLES
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
Ettringite |
1.47 |
1.491 |
0.021 |
0.021 |
1.77 |
1.77 |
|
|
|
|
http://www.gemmology.be
|
Ettringite |
1.47 |
1.491 |
0.021 |
0.021 |
1.77 |
1.77 |
1.470 |
1.470 |
1.491 |
1.491 |
http://www.geminterest.com
|
Ettringite |
1.47 |
1.491 |
0.021 |
0.021 |
1.77 |
1.77 |
1.470 |
1.470 |
1.491 |
1.491 |
Joel Arem, Color Encyclopedia of Gemstones,
1987
|
Ettringite |
1.47 |
1.491 |
0.021 |
0.021 |
1.76 |
1.78 |
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA