|
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 |
Leadhillite |
1.87 |
2.01 |
|
|
6.53 |
6.53 |
colourless,
transparent |
|
1ea,
faceted |
|
|
|
|
|
|
|
very weak
violet |
very weak
violet |
Gems & Gemology 2003 fall p
216 |
Leadhillite |
|
|
|
|
6.55 |
6.55 |
colourless |
Tsumeb,
Namibia |
3.51ct, biaxial
- |
|
|
|
|
|
|
|
inert |
inert |
GIA Gem Database
35579 |
TABLES
CAUSE OF COLOUR
MINERAL INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)