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

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