|
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 |
|
Datolite |
1.622 |
1.65 |
0.028 |
0.028 |
3.01 |
3.01 |
colourless |
Lane Quarry, Westfield, Hampden
County, Massachussets, USA |
12.12ct |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database
35178 |
|
Datolite |
1.622 |
1.669 |
0.047 |
0.047 |
3 |
3 |
yellowish
green |
|
13ct |
|
|
|
|
|
|
|
inert |
inert |
Gems & Gemology 2001 Fall, p
213 |
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 |
|
Datolite |
1.62 |
1.672 |
0.042 |
0.048 |
2.85 |
3.02 |
|
|
|
|
|
|
Gemmo.eu 2013
|
|
Datolite |
1.621 |
1.675 |
0.04 |
0.05 |
2.9 |
3 |
1.621 |
1.631 |
|
|
1.664 |
1.675 |
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
|
Datolite |
1.621 |
1.674 |
0.044 |
0.5 |
2.9 |
3 |
1.621 |
1.631 |
|
|
1.666 |
1.674 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
|
Datolite |
1.621 |
1.7 |
0.043 |
0.069 |
2.9 |
3 |
1.621 |
1.631 |
1.648 |
1.658 |
1.665 |
1.700 |
Gemmological Tables, Ulrich Henn, 2004
|
|
Datolite |
1.621 |
1.669 |
0.043 |
0.045 |
2.9 |
3 |
1.621 |
1.625 |
|
|
1.665 |
1.669 |
Tabellen zur Edelstein-Bestimmung, Pschichholz
FGA, 1975
|
|
Datolite |
1.621 |
1.67 |
0.044 |
0.047 |
2.8 |
3 |
1.621 |
1.626 |
1.649 |
1.658 |
1.666 |
1.670 |
http://www.geminterest.com
|
|
Datolite |
1.622 |
1.67 |
0.044 |
0.047 |
2.8 |
3 |
|
|
|
|
|
|
http://www.gemmology.be
|
|
Datolite |
1.622 |
1.67 |
0.044 |
0.047 |
2.8 |
3 |
1.622 |
1.626 |
1.649 |
1.658 |
1.666 |
1.670 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
|
Datolite |
1.622 |
1.675 |
0.04 |
0.05 |
2.8 |
3 |
1.622 |
1.631 |
1.649 |
1.658 |
1.666 |
1.675 |
Tables of Gemstone
Identification, Roger Dedeyne, Ivo Quintens, 2007
|
|
Datolite |
1.622 |
1.67 |
0.044 |
0.046 |
2.9 |
3 |
|
|
|
|
|
|
Gemology Tools Professional 2010
|
|
Datolite |
1.625 |
1.7 |
0.044 |
0.045 |
2.9 |
3 |
|
|
|
|
|
|
John Sinkakas, Gemstone and
mineral data book,1972
|
|
Datolite |
1.625 |
1.669 |
0.044 |
0.044 |
2.9 |
3 |
|
|
|
|
|
|
Gems, R Webster, 5th edition
1994
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA