|
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 |
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.765 |
2.765 |
lively
violet |
|
translucent |
|
|
|
|
411, 419, 437 lines, weak bands: 488-493 and
630-645 |
very weak dark
red |
weak
violet |
The Journal of Gemmology 1979 Vol 16, N°8,
p514-516 |
TABLES
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.76 |
2.9 |
1.606 |
1.606 |
1.608 |
1.608 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.77 |
2.9 |
1.606 |
1.606 |
1.608 |
1.608 |
Gemmological Tables, Ulrich Henn, 2004
|
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.76 |
2.9 |
|
|
|
|
http://www.gemmology.be
|
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.76 |
2.9 |
1.608 |
1.608 |
1.606 |
1.606 |
Joel Arem, Color Encyclopedia of Gemstones,
1987
|
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.76 |
2.9 |
1.608 |
1.608 |
1.606 |
1.606 |
http://www.geminterest.com
|
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.76 |
2.9 |
|
|
|
|
Gems, R Webster, 5th edition 1994
|
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.76 |
2.9 |
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 2008
|
Sogdianite |
1.606 |
1.608 |
0.002 |
0.002 |
2.76 |
2.9 |
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA (%)