|
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 |
Psilomelane |
|
|
|
|
4.35 |
4.35 |
|
|
test with HCl : release
chlorine |
|
|
|
|
|
|
|
|
|
Gems & Gemology 1967 Spring, p
179 |
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 |
Psilomelane |
2.11 |
2.26 |
0.15 |
0.15 |
4.4 |
4.7 |
|
|
|
|
|
|
Tables of Gemstone
Identification, Roger Dedeyn, Ivo Quintens, 2007
|
Psilomelane |
|
|
|
|
4.35 |
4.35 |
|
|
|
|
|
|
Gems, R Webster, 5th edition
1994
|
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA (%)