|
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 |
|
Celestine |
1,617 |
1,62 |
0,003 |
0,003 |
3,98 |
3,98 |
light greyish blue |
Sterling Mine, Stoneham,
Colorado, USA |
11.52ct |
|
|
|
|
|
|
no features |
inert |
inert |
GIA Gem Database 35176 |
|
Celestine |
1,620 |
1,630 |
0,01 |
0,01 |
3,98 |
3,98 |
colourless |
|
10.64ct |
|
|
|
|
|
|
|
inert |
weak yellowish |
ACAM Lab 321 |
|
Celestine |
1,62 |
1,631 |
0,011 |
0,011 |
3,98 |
3,98 |
almost colourless with
very faint greyish blue tint |
Madagascar |
4,22ct, diamagnetic |
|
|
|
|
|
|
|
inert |
inert |
http://www.spec4gem.info/
2023 03 june |
|
Celestine |
1,621 |
1,632 |
0,011 |
0,011 |
4,01 |
4,01 |
light greyish violet |
Madagascar |
|
|
|
|
|
|
|
|
very weak green |
very weak green |
GIA Gem Database 35361 |
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 |
|
Celestine |
1.617 |
1.633 |
0.01 |
0.014 |
3.95 |
4.02 |
|
|
|
|
|
|
Gemmo.eu 2016 |
|
Celestine |
1.619 |
1.635 |
0.01 |
0.012 |
3.96 |
4 |
|
|
|
|
|
|
Bestimmungstabellen
für Edelsteine, Birgit Günther, 1981 |
|
Celestine |
1.619 |
1.635 |
0.009 |
0.012 |
3.96 |
4 |
1.619 |
1.625 |
|
|
1.631 |
1.635 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Celestine |
1.619 |
1.635 |
0.01 |
0.012 |
3.95 |
4 |
1.619 |
1.625 |
1.621 |
1.628 |
1.630 |
1.635 |
Gemmological Tables, Ulrich Henn,
2004 |
|
Celestine |
1.619 |
1.635 |
0.009 |
0.012 |
3.97 |
4 |
1.619 |
1.625 |
1.624 |
1.624 |
1.631 |
1.635 |
Joel Arem, Color
Encyclopedia of Gemstones, 1987 |
|
Celestine |
1.619 |
1.635 |
0.01 |
0.012 |
3.97 |
4 |
|
|
|
|
|
|
Gems, R Webster,
5th edition 1994 |
|
Celestine |
1.619 |
1.635 |
0.009 |
0.012 |
3.97 |
4 |
1.619 |
1.625 |
1.622 |
1.624 |
1.630 |
1.635 |
Tables of
Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
|
Celestine |
1.621 |
1.635 |
0.008 |
0.012 |
3.9 |
4 |
1.621 |
1.625 |
1.622 |
1.624 |
1.630 |
1.635 |
http://www.geminterest.com |
|
Celestine |
1.621 |
1.635 |
0.009 |
0.012 |
3.97 |
4 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Celestine |
1.622 |
1.635 |
0.009 |
0.12 |
3.97 |
4 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
|
Celestine |
1.623 |
1.635 |
0.01 |
0.01 |
3.97 |
4 |
1.623 |
1.625 |
|
|
1.633 |
1.635 |
Tabellen zur
Edelstein-Bestimmung, Pschichholz FGA, 1975
|
|
Celestine |
1.625 |
1.635 |
0.009 |
0.01 |
3.97 |
3.99 |
|
|
|
|
|
|
John Sinkakas,
Gemstone and mineral data book,1972 |
CAUSE OF
COLOUR
|
Stone |
Colour |
Cause
of colour |
Reference |
|
Celestine |
blue |
colour centers |
American Mineralogist Volume 64, pages
160-168, 1979 |
|
Celestine |
orange |
The color in two
specimens of orange celestite was correlated to the presence of copper,
probably as Cu+, in the order of 50 ppm |
American Mineralogist Volume 64, pages 160-168,
1979 |
MINERAL
INCLUSIONS
LOCALITIES