|
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 |
Colemanite |
1.581 |
1.608 |
0.027 |
0.027 |
2.47 |
2.47 |
colourless |
Kenya |
7.78ct |
|
|
|
|
|
|
|
very weak greenish
yellow |
very weak
yellow |
GIA Gem Database
34351 |
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 |
Colemanite |
1.584 |
1.615 |
0.028 |
0.03 |
2.4 |
2.42 |
1.584 |
1.586 |
1.591 |
1.592 |
1.614 |
1.615 |
Gemmological Tables, Ulrich Henn, 2004
|
Colemanite |
1.586 |
1.614 |
0.028 |
0.028 |
2.42 |
2.42 |
|
|
|
|
|
|
John Sinkakas, Gemstone and
mineral data book,1972
|
Colemanite |
1.586 |
1.615 |
0.028 |
0.03 |
2.4 |
2.42 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
Colemanite |
1.586 |
1.615 |
0.025 |
0.03 |
2.4 |
2.42 |
1.586 |
1.586 |
|
|
1.613 |
1.615 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
Colemanite |
1.586 |
1.614 |
0.028 |
0.028 |
2.42 |
2.42 |
|
|
|
|
|
|
http://www.gemmology.be
|
Colemanite |
1.586 |
1.614 |
0.028 |
0.028 |
2.42 |
2.42 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung, Pschichholz
FGA, 1975
|
Colemanite |
1.586 |
1.614 |
0.028 |
0.028 |
2.4 |
2.42 |
1.586 |
1.586 |
1.592 |
1.592 |
1.614 |
1.614 |
http://www.geminterest.com
|
Colemanite |
1.586 |
1.614 |
0.028 |
0.028 |
2.42 |
2.42 |
1.586 |
1.586 |
1.592 |
1.592 |
1.614 |
1.614 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
Colemanite |
1.586 |
1.614 |
0.028 |
0.028 |
2.42 |
2.42 |
1.586 |
1.586 |
1.592 |
1.592 |
1.614 |
1.614 |
Gems, R Webster, 5th edition
1994
|
Colemanite |
1.586 |
1.614 |
0.028 |
0.028 |
2.4 |
2.42 |
|
|
|
|
|
|
Tables of Gemstone
Identification, Roger Dedeyn, Ivo Quintens, 2007
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
Inclusion |
Stone |
Reference |
pararealgar |
Colemanite |
The Jim&Dawn Minette
collection, 2010 |
LOCALITIES
CHEMICAL
DATA