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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

Titanite

1.9

1.99

 

 

3.48

3.6

emerald green

Chibougamau, Quebec, Canada

0.40-0.54ct, V-bearing

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1997

Titanite

 

 

 

 

3.51

3.54

yellow, brownish yellowish orange,  yellowish orange-brown

Pakistan

0.16 - 1.16 ct

 

 

 

 

 

 

580 nm doublet

inert

inert

Gems & Gemology 2006 Spring, p68-69

Titanite

 

 

 

 

3.52

3.52

green

 

 

 

 

 

 

 

 

 

 

 

ACAM labo 

Titanite

1.91

2.07

0.16

0.16

3.52

3.52

yellow-green

Madagascar

0.49ct

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 1981 Vol 17, N6, p381-385

Titanite

1.909

2.099

0.19

0.19

3.52

3.52

dark brown

Sri Lanka

4.48ct

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 1981 Vol 17, N6, p381-385

Titanite

 

 

 

 

3.52

3.54

yellowish-green

Madagascar

1.16-4.15ct

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2010 59/3-4, p66

Titanite

 

 

 

 

3.52

3.52

yellow-green

Archer's Post, Eastern Province, Kenya

5.83ct

 

 

 

 

 

 

broad absorption below 430nm

inert

inert

GIA Gem Database  34376

Titanite

1.908

 

 

 

3.528

3.538

brownish yellow, yellowish-green, honey-yellow

Sri Lanka

1.25 - 6.48ct

1.908

1.913

 

 

 

 

rare earth lines in the yellow

 

 

The Journal of Gemmology 1981 Vol 17, N8, p624-6635

Titanite

 

 

 

 

3.53

3.54

brownish yellow, greenish yellow

Badakhstan, Afghanistan

transparent, strong dispersion; chelsea: weak pink

 

 

 

 

 

 

580nm doublet and 510nm line

inert

inert

Gems & Gemology 2006 summer, p180-182

Titanite

 

 

 

 

3.53

3.54

green-brown , brown)green

Pakistan

1.52 to 4.93 ct, transparent

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2009 58/3-4/Dec, p85-86

Titanite

1.908

2.08

0.181

0.181

3.53

3.53

emerald green

Baja California, Mexico

4.99ct

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 1981 Vol 17, N6, p381-385

Titanite

 

 

 

 

3.53

3.53

yellowish green

El Alamo mine, Ensenada, Baja California, Mexico

7.85ct

 

 

 

 

 

 

 

inert

inert

GIA Gem Database  34216

Titanite

 

 

 

 

3.53

3.53

greenish yellow

El Alamo mine, Ensenada, Baja California, Mexico

8.18ct

 

 

 

 

 

 

broad absorption below 430nm

inert

inert

GIA Gem Database  34206

Titanite

 

 

 

 

3.53

3.53

yellow

Baja California, Mexico

1.26ct

 

 

 

 

 

 

 

inert

inert

GIA Gem Database  35535

Titanite

 

 

 

 

3.53

3.53

yellowish green

Orissa, India

20.86ct

 

 

 

 

 

 

broad absorption below 430nm and above 680nm; lines at 518, 532, 538, 584, 590, 594

inert

inert

GIA Gem Database  34332

Titanite

1.908

2.099

0.16

0.19

3.54

3.54

green

Sarany, Perm Region, central Urals

<0.25 ct

1.908

1.912

 

 

2.07

2.10

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1995 44(1), p29-32

Titanite

 

 

 

 

3.54

3.54

yellow

Lake Naret, Lavizzara Valley, Ticino, Switzerland

2.61ct

 

 

 

 

 

 

broad absorption below 430nm and above 670nm

inert

inert

GIA Gem Database  34980

Titanite

 

 

 

 

3.54

3.54

colour change : vivid green and yellowish green (daylight) to brownish orange or brown

border Pakistan/Afghanistan

chelsea filter: strong red; V-bearing; up to 5.45ct

 

 

 

 

 

 

 

 

 

Gems & Gemology 2011 Winter, p327

Titanite

 

 

 

 

3.55

3.55

yellow-green

Campo do Boa mine, Capelinha, Minas Gerais, Brazil

4.18ct

 

 

 

 

 

 

 

inert

inert

GIA Gem Database  34298

Titanite

 

 

 

 

3.56

3.56

green-yellow

 

 

 

 

 

 

 

 

 

 

 

ACAM labo 

Titanite

 

 

 

 

3.63

3.63

dark orange

Pakistan

3.11ct

 

 

 

 

 

 

broad absorption below 495m ; lines at 519, 530, 533, 538, 543, 573, 580, 583, 587, 590, 595, 600, 613, 652

inert

inert

GIA Gem Database  34226

Titanite

 

 

 

 

3.66

3.66

green

El Alamo mine, Ensenada, Baja California, Mexico

0.84ct, transparent

 

 

 

 

 

 

broad absorption below 435nm and above 675nm

inert

inert

GIA Gem Database  35538

Titanite

 

 

 

 

3.66

3.66

dark orange

India

2.86ct

 

 

 

 

 

 

broad absorption below 450nm; lines at 516, 528, 532, 538, 578, 582, 585

inert

inert

GIA Gem Database  34021

 

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

Titanite

1.84

2.11

0.1

0.192

3.4

3.6

1.840

1.950

 

 

1.940

2.110

Gemme, Dati per l'identificazione, P. De Stefano et al, 1993 

Titanite

1.842

2.111

0.1

0.192

3.44

3.56

 

 

 

 

 

 

Gemmo.eu 2013

Titanite

1.843

2.11

0.16

0.191

3.45

3.55

 

 

 

 

 

 

http://www.gemmology.be 

Titanite

1.843

2.11

0.1

0.192

3.45

3.55

1.843

1.950

1.870

2.034

1.943

2.110

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Titanite

1.843

2.11

0.051

0.051

3.45

3.55

1.843

1.950

1.870

2.034

1.943

2.110

http://www.geminterest.com 

Titanite

1.843

2.11

0.1

0.192

3.45

3.55

1.843

1.950

 

 

1.943

2.110

Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 

Titanite

1.88

2.05

0.12

0.135

3.45

3.55

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Titanite

1.88

2.054

0.1

0.135

3.5

3.54

 

 

 

 

 

 

Gemology Tools Professional 2010

Titanite

1.882

2.054

0.105

0.135

3.5

3.54

1.882

1.918

 

 

1.990

2.054

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Titanite

1.885

2.099

0.108

0.19

3.5

3.55

1.885

1.921

1.896

1.930

1.993

2.099

Gemmological Tables, Ulrich Henn, 2004 

Titanite

1.885

2.05

0.105

0.135

3.52

3.54

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Titanite

1.9

2.054

0.1

0.135

3.5

3.54

 

 

 

 

 

 

Bestimmungstabellen fr Edelsteine, Birgit Gnther, 1981 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Titanite

green

high Fe content

Gems & Gemology Summer 1988

Titanite

green (chrom)

Cr+ in octahedral coordination

Gems & Gemology Summer 1988

Titanite

pink

Mn+ in octahedral coordination, for certain Mn/Fe ratios, as well as pink carbonate inclusions

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

actinolite

Titanite

Internal World of Gemstones, Gbelin, 1983

apatite

Titanite

The Journal of Gemmology 1981, Vol 17, N8, p634

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Titanite

 

Pattukaranur

Tamil Nadu

India

Gems & Gemology 2000 winter p325

Titanite

San Quintin

Ensenada

Baja California Norte

Mexico

http://www.thegemtrader.com

Titanite

Niaslo (Nieosla; Niesolo), Basha Valley (Basha Nala; Basna)

Skardu District

Baltistan

Pakistan

Gems & Gemology 2010 Summer p152-153

Titanite

Elahera

Polonnaruwa

Central Province

Sri Lanka

Gems & Gemology 2000 winter p324

Titanite

 

Galle

Souther Province

Sri Lanka

Gems & Gemology 2000 winter p324

Titanite

Morawaka

Matara

Southern Province

Sri Lanka

Gems & Gemology 2000 winter p324

Titanite

Akuressa

Matara

Southern Province

Sri Lanka

Gems & Gemology 2000 winter p324

Titanite

Kataragama

Monaragala

Southern Province

Sri Lanka

Gems & Gemology 2000 winter p324

Titanite

Umba Valley

Lelatema Mts

Arusha Region

Tanzania

Gemmologie, 1997, Mar,p31

 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

SiO2

Al2O3

Mn

MgO

FeO

TiO2

CaO

Na2O

Cr2O3

V2O3

Fe2O3

K2O

Titanite

emerald-green

 

Baja California, Mexico

The Journal of Gemmology 1981, Vol 17, N6, p382

29.92

0.82

 

0.06

 

38.39

28.97

 

0.38

 

0.26

0.03

Titanite

yellow-green

 

Brazil

The Journal of Gemmology 1981, Vol 17, N8, p631

30.4

1.37

0.04

 

 

38.2

28.6

 

0.015

 

0.41

 

Titanite

emerald green

Chibougamau, Quebec

Canada

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1997, Dec, p227

31.41

1.19

 

 

 

37.67

29.31

 

 

0.62

0.66

 

Titanite

yellow-green

 

Madagascar

The Journal of Gemmology 1981, Vol 17, N6, p382

29.87

1.21

0.23

0.09

 

37.63

28.63

0.02

0.21

 

0.6

0.03

Titanite

emerald green

 

Mexico

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1997, Dec, p227

29.92

0.82

 

0.06

 

38.39

28.97

 

0.38

 

0.26

0.03

Titanite

emerald green

Sarany, Ural Mts

Russia

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1997, Dec, p227

29.91

0.98

 

0.02

0.02

38.74

27.34

0.09

0.53

 

 

0.02

Titanite

emerald green

Sarany, Ural Mts

Russia

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1997, Dec, p227

31.49

1.1

 

0.25

0.95

36.51

27.77

 

0.64

 

 

 

Titanite

honey-brown

 

Sri Lanka

The Journal of Gemmology 1981, Vol 17, N8, p631

30.4

1.25

0.07

 

 

38.4

28.4

 

0.015

 

0.7

 

Titanite

honey-brown

 

Sri Lanka

The Journal of Gemmology 1981, Vol 17, N8, p631

30.4

1.11

0.04

 

 

38.6

28.7

 

 

 

0.6

 

Titanite

dark brown

 

Sri Lanka

The Journal of Gemmology 1981, Vol 17, N6, p382

29.92

0.85

 

0.17

 

38.61

28.53

0.4

 

 

0.45

0.03