|
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 |
|
Sulfur |
1.958 |
2.245 |
0.291 |
0.291 |
2.05 |
2.09 |
|
|
|
|
|
|
http://www.gemmology.be
|
|
Sulfur |
1.958 |
2.245 |
0.291 |
0.291 |
2.05 |
2.09 |
1.958 |
1.958 |
2.038 |
2.038 |
2.245 |
2.245 |
Joel Arem, Color Encyclopedia of Gemstones,
1987
|
|
Sulfur |
1.958 |
2.245 |
0.291 |
0.291 |
2.05 |
2.09 |
1.958 |
1.958 |
2.038 |
2.038 |
2.245 |
2.245 |
http://www.geminterest.com
|
|
Sulfur |
1.958 |
2.245 |
0.291 |
0.291 |
2.05 |
2.09 |
|
|
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyn,
Ivo Quintens, 2007
|
|
Sulfur |
2.05 |
2.26 |
0.29 |
0.29 |
|
|
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972
|
CAUSE OF COLOUR
|
Stone |
Colour |
Cause of
colour |
Reference |
|
Sulfur |
orange,
yellow |
band theory : metalloid
semi-conductor |
http://toutsurlesgrenats.free.fr |
|
Sulfur |
yellow |
nonmetal-nonmetal charge transfer (covalently
bonded) |
http://www.gamineral.org/color_in_minerals.html |
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA (%)