|
INVESTIGATIONS
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 |
|
Talc |
1.534 |
1.601 |
0.05 |
0.05 |
2.2 |
2.83 |
1.534 |
1.555 |
|
|
1.589 |
1.601 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
|
Talc |
1.539 |
1.596 |
0.046 |
0.05 |
2.2 |
2.8 |
1.539 |
1.550 |
1.589 |
1.594 |
1.589 |
1.596 |
Gemmological Tables, Ulrich Henn, 2004
|
|
Talc |
1.539 |
1.6 |
0.039 |
0.05 |
2.2 |
2.83 |
|
|
|
|
|
|
http://www.gemmology.be
|
|
Talc |
1.539 |
1.6 |
0.039 |
0.05 |
2.2 |
2.83 |
1.539 |
1.550 |
1.589 |
1.594 |
1.589 |
1.600 |
Joel Arem, Color Encyclopedia of Gemstones,
1987
|
|
Talc |
1.539 |
1.6 |
0.037 |
0.05 |
2.2 |
2.83 |
1.539 |
1.550 |
1.589 |
1.594 |
1.589 |
1.600 |
http://www.geminterest.com
|
|
Talc |
1.539 |
1.6 |
0.05 |
0.05 |
2.2 |
2.83 |
1.539 |
1.550 |
1.589 |
1.594 |
1.589 |
1.600 |
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
|
Talc |
1.54 |
1.58 |
|
|
2.7 |
2.8 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972
|
|
Talc |
1.54 |
1.59 |
0.05 |
0.05 |
2.55 |
2.8 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine, Birgit
Günther, 1981
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA (%)