|
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 |
Witherite |
1.53 |
1.678 |
0.148 |
0.148 |
4.31 |
4.31 |
light yellow |
United Kingdom |
18.35ct, translucent |
|
|
|
|
|
|
no features |
weak greenish yellow |
inert |
GIA Gem Database 35548 |
Witherite |
1.532 |
1.679 |
0.147 |
0.147 |
4.27 |
4.27 |
colourless |
|
0.40ct |
1.532 |
1.532 |
1.676 |
1.676 |
1.679 |
1.679 |
|
strong white |
bluish |
ACAM lab
4743 |
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 |
Witherite |
1.52 |
1.52 |
|
|
4.27 |
4.45 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
Witherite |
1.526 |
1.68 |
0.145 |
0.151 |
4.21 |
4.35 |
|
|
|
|
|
|
Gemmo.eu
|
Witherite |
1.529 |
1.677 |
0.148 |
0.148 |
4.27 |
4.79 |
|
|
1.529 |
1.529 |
1.676 |
1.676 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
Witherite |
1.529 |
1.677 |
0.148 |
0.148 |
4.3 |
4.3 |
|
|
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Witherite |
1.529 |
1.677 |
0.148 |
0.148 |
4.27 |
4.79 |
1.529 |
1.532 |
|
|
1.674 |
1.677 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Witherite |
1.529 |
1.68 |
0.148 |
0.148 |
4.27 |
4.35 |
1.529 |
1.532 |
1.676 |
1.678 |
1.677 |
1.680 |
Gemmological Tables, Ulrich Henn,
2004 |
Witherite |
1.529 |
1.677 |
0.148 |
0.148 |
4.27 |
4.79 |
|
|
|
|
|
|
http://www.gemmology.be |
Witherite |
1.529 |
1.677 |
0.148 |
0.148 |
4.27 |
4.79 |
1.529 |
1.529 |
1.676 |
1.676 |
1.677 |
1.677 |
http://www.geminterest.com |
Witherite |
1.529 |
1.677 |
0.148 |
0.148 |
4.27 |
4.79 |
|
|
|
|
|
|
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
Witherite |
1.529 |
1.677 |
0.148 |
0.148 |
4.27 |
4.79 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
Witherite |
1.532 |
1.68 |
0.148 |
0.148 |
4.27 |
4.35 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Witherite |
1.532 |
1.68 |
0.148 |
0.148 |
4.27 |
4.35 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)