|
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 |
Anatase |
|
|
|
|
3.83 |
3.87 |
brownish orange to yellowish brown |
Pakistan |
0.10 to 0.17ct |
|
|
|
|
|
|
|
The Journal of Gemmology 2016 35 (3), p186 |
Anatase |
|
|
|
|
3.85 |
3.85 |
brown |
Pakistan |
0.77 ct, translucent |
|
|
|
|
|
|
|
Gemmologie, Zeitschrift der Deutschen
Gemmologischen Gesellschaft 2008 Dec, p113 |
Anatase |
|
|
|
|
3.95 |
3.95 |
dark reddish orange |
Brazil |
1.97ct |
|
|
|
|
line at 490nm, cut off 450nm |
|
|
GIA Gem Database 35316 |
TABLES
Stone |
RI min |
RI max |
Biref min |
Biref max |
Dens min |
Dens max |
ne min |
ne max |
no min |
no max |
Reference |
Anatase |
2.487 |
2.562 |
0.055 |
0.067 |
3.79 |
3.97 |
|
|
|
|
Gemmo.eu 2017 |
Anatase |
2.488 |
2.497 |
0.046 |
0.067 |
3.82 |
3.97 |
2.488 |
2.497 |
2.534 |
2.56 |
Gemme, Dati per l'identificazione, P. De
Stefano et al, 1993 |
Anatase |
2.488 |
2.562 |
0.073 |
0.073 |
3.9 |
3.9 |
2.488 |
2.489 |
2.561 |
2.56 |
Gemmological Tables, Ulrich Henn,
2004 |
Anatase |
2.488 |
2.564 |
0.046 |
0.067 |
3.82 |
3.97 |
|
|
|
|
http://www.gemmology.be |
Anatase |
2.488 |
2.564 |
0.046 |
0.067 |
3.82 |
3.97 |
2.488 |
2.497 |
2.534 |
2.56 |
http://www.geminterest.com |
Anatase |
2.488 |
2.497 |
0.046 |
0.067 |
3.82 |
3.97 |
2.488 |
2.497 |
2.534 |
2.56 |
Joel Arem, Color Encyclopedia of Gemstones, 1987 |
Anatase |
2.488 |
2.564 |
0.046 |
0.067 |
3.79 |
3.97 |
2.488 |
2.497 |
2.534 |
2.56 |
Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 |
Anatase |
2.493 |
2.554 |
0.061 |
0.061 |
3.82 |
3.97 |
|
|
|
|
Bestimmungstabellen für Edelsteine,
Birgit Günther, 1981 |
Anatase |
2.493 |
2.554 |
0.061 |
0.061 |
3.8 |
3.95 |
|
|
|
|
Tabellen zur Edelstein-Bestimmung,
Pschichholz FGA, 1975 |
Anatase |
2.493 |
2.554 |
0.061 |
0.061 |
3.88 |
3.88 |
|
|
|
|
John Sinkakas, Gemstone and mineral data book,1972 |
Anatase |
2.493 |
2.554 |
0.061 |
0.061 |
3.82 |
3.95 |
|
|
|
|
Gems, R Webster, 5th edition 1994 |
Anatase |
2.493 |
2.554 |
0.061 |
0.061 |
3.82 |
3.95 |
2.493 |
2.493 |
2.554 |
2.554 |
Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification
(2006), 873pp |
CAUSE OF
COLOUR
Stone |
Colour |
Cause
of colour |
Reference |
Anatase |
green to blue |
V4+ in octahedral coordination |
Alain Abréal, juillet 2002 |
MINERAL
INCLUSIONS
LOCALITIES