|
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 |
Sanidine |
1.516 |
1.526 |
0.005 |
0.007 |
2.57 |
2.58 |
colourless to smoky
brown |
Volkesfeld, Mendig, Eifel,
Germany |
86% K-feldspar and 14%
albite |
1.516 |
1.520 |
|
|
1.522 |
1.526 |
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1998 Jun,
p92-93 |
Sanidine |
1.52 |
1.524 |
0.004 |
0.004 |
2.58 |
2.58 |
dark brownish yellowish
orange |
Volkesfeld, Eifel,
Germany |
28.96ct,
biaxial- |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database
33094 |
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 |
Sanidine |
1.516 |
1.53 |
0.006 |
0.008 |
2.55 |
2.62 |
1.516 |
1.520 |
|
|
1.521 |
1.530 |
Gemme, Dati per l'identificazione, P. De Stefano
et al, 1993
|
Sanidine |
1.516 |
1.534 |
0.003 |
0.007 |
2.56 |
2.62 |
1.516 |
1.527 |
1.520 |
1.533 |
1.521 |
1.534 |
http://www.geminterest.com
|
Sanidine |
1.516 |
1.534 |
0.004 |
0.008 |
2.56 |
2.62 |
1.516 |
1.527 |
|
|
1.522 |
1.534 |
Tables of Gemstone
Identification, Roger Dedeyn, Ivo Quintens, 2007
|
Sanidine |
1.518 |
1.534 |
|
|
2.56 |
2.62 |
1.518 |
1.527 |
1.522 |
1.533 |
1.522 |
1.534 |
Joel Arem, Color Encyclopedia
of Gemstones, 1987
|
Sanidine |
1.518 |
1.534 |
0.004 |
0.007 |
2.56 |
2.62 |
|
|
|
|
|
|
http://www.gemmology.be
|
Sanidine |
1.518 |
1.524 |
0.006 |
0.006 |
2.57 |
2.58 |
|
|
|
|
|
|
Gems, R Webster, 5th edition
1994
|
Sanidine |
|
|
|
|
2.56 |
2.57 |
|
|
|
|
|
|
John Sinkakas, Gemstone and
mineral data book,1972
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
STONE |
LOCALITIES |
REFERENCE | |||
Sanidien |
Volkesfeld,
Weibern |
Eifel |
Rhineland-Palatinate |
Germany |
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 1998 Jun,
p92-93 |
CHEMICAL DATA (%)