|
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 |
wurtzite |
|
|
|
|
3.78 |
3.85 |
orange-brown |
Merelani, Tanzania |
0.30 to 1.74 ct |
|
|
|
|
|
inert |
inert |
Gems & Gemology 2013 Winter, p261 |
wurtzite |
2.36 |
2.36 |
|
|
3.81 |
3.81 |
reddish brown |
Merelani, Tanzania |
0.91ct and 0.83ct |
|
|
|
|
|
|
|
The Journal of Gemmology 2015 Vol 38, No 8, p669-671 |
wurtzite |
|
|
|
|
3.96 |
3.96 |
brownish red |
|
3.97ct |
|
|
|
|
|
inert |
inert |
Gems & Gemology 2014 Summer, p156 |
synthetic wurtzite |
2.3 |
2.3 |
|
|
4.06 |
4.06 |
bright green (Co), yellow (Ni), blue (Cu) |
|
|
|
|
|
|
|
|
|
The Journal of Gemmology 1978 N°1, p30 |
TABLES
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
Synthetic wurtzite |
2.356 |
2.378 |
0.022 |
0.022 |
4.03 |
4.03 |
2.378 |
2.378 |
2.356 |
2.356 |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |
Synthetic wurtzite |
2.356 |
2.378 |
0.022 |
0.022 |
4.03 |
4.06 |
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Synthetic wurtzite |
2.356 |
2.378 |
0.022 |
0.022 |
4.03 |
4.09 |
2.378 |
2.378 |
2.356 |
2.356 |
Gemmological Tables, Ulrich Henn,
2004 |
Synthetic wurtzite |
2.356 |
2.378 |
0.022 |
0.022 |
3.98 |
4.06 |
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
Synthetic wurtzite |
2.378 |
2.356 |
0.022 |
0.022 |
4.03 |
4.06 |
2.378 |
2.378 |
2.356 |
2.356 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
STONE |
LOCALITIES |
REFERENCE |
|||
Wurtziet |
Merelani Hills (Mererani) |
Lelatema Mts |
Arusha Region |
Tanzania |
Gems & Gemology 2013 Winter,
p261-262 |
CHEMICAL DATA