|
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 |
|
Whewellite |
1.488 |
1.65 |
0.162 |
0.162 |
2.23 |
2.23 |
colourless, transparent |
Sachsen, Germany |
0.49ct |
|
|
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2008 Dec, p124 |
|
Whewellite |
1.489 |
1.649 |
0.16 |
0.16 |
2.21 |
2.23 |
colourless to slightly yellow |
Czech Republic |
30 stones from 0.05ct to 2.21ct |
|
|
|
|
|
|
|
very weak whitish |
intense white |
The Journal of Gemmology 2017 Vol 35-7, p583 |
|
Whewellite |
1.49 |
1.65 |
0.16 |
0.16 |
2.23 |
2.23 |
|
|
|
1.490 |
1.490 |
1.555 |
1.555 |
1.650 |
1.650 |
|
|
|
Gems & Gemology 1969 Winter, p130 |
|
Whewellite |
1.493 |
1.65 |
0.157 |
0.157 |
2.16 |
2.16 |
|
|
0.1ct |
1.493 |
1.493 |
1.557 |
1.557 |
1.650 |
1.650 |
|
inert |
bluish |
ACAM lab
4732 |
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 |
|
Whewellite |
1.488 |
1.656 |
0.157 |
0.165 |
2.2 |
2.25 |
|
|
|
|
|
|
Gemmo.eu
|
|
Whewellite |
1.489 |
1.651 |
0.159 |
0.163 |
2.19 |
2.25 |
1.489 |
1.489 |
1.553 |
1.553 |
1.649 |
1.651 |
Joel Arem, Color Encyclopedia of Gemstones,
1987 |
|
Whewellite |
1.489 |
1.652 |
0.16 |
0.164 |
2.19 |
2.25 |
1.489 |
1.490 |
|
|
1.648 |
1.652 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
|
Whewellite |
1.489 |
1.651 |
0.159 |
0.163 |
2.19 |
2.25 |
|
|
|
|
|
|
http://www.gemmology.be |
|
Whewellite |
1.489 |
1.651 |
0.159 |
0.163 |
2.19 |
2.25 |
1.489 |
1.491 |
1.553 |
1.554 |
1.649 |
1.651 |
http://www.geminterest.com |
|
Whewellite |
1.489 |
1.651 |
0.159 |
0.163 |
2.19 |
2.25 |
1.489 |
1.489 |
1.553 |
1.553 |
1.649 |
1.651 |
Tables of Gemstone Identification, Roger Dedeyne,
Ivo Quintens, 2007 |
|
Whewellite |
1.489 |
1.651 |
0.159 |
0.163 |
2.19 |
2.25 |
|
|
|
|
|
|
Gemology Tools Professional 2010 |
|
Whewellite |
1.49 |
1.65 |
0.16 |
0.16 |
2.23 |
2.23 |
|
|
|
|
|
|
John Sinkakas, Gemstone and mineral data
book,1972 |
|
Whewellite |
1.49 |
1.652 |
0.16 |
0.164 |
2.23 |
2.25 |
1.490 |
1.490 |
1.555 |
1.555 |
1.650 |
1.652 |
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
|
Whewellite |
1.49 |
1.65 |
0.16 |
0.16 |
2.23 |
2.23 |
|
|
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
|
Whewellite |
1.49 |
1.65 |
0.16 |
0.16 |
2.23 |
2.23 |
|
|
|
|
|
|
Gems, R Webster, 5th edition 1994 |
CAUSE OF
COLOUR
MINERAL
INCLUSIONS
LOCALITIES
CHEMICAL DATA
(%)