|
INVESTIGATIONS
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
Colour |
Location |
Info |
ne min |
ne max |
no min |
no max |
Spectrum |
UVS |
UVL |
Reference |
Laurentthomasite |
1.555 |
1.56 |
0.005 |
0.005 |
2.59 |
2.63 |
greenish blue |
Toliara Province, Madagascar |
0.98ct and 1.67ct |
|
|
|
|
|
inert |
inert |
The Journal of Gemmology 2020 Vol 37 (2), p136-139 |
TABLES
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)